In both book and film series, many of the dragons are shown to possess unique types of breath weapons. These differences make the dragons attacks much more varied in combat style. Here are some examples. This ability makes them "different" from other organisms, and even capable of confronting human beings armed with artificial weapons and group strategies. Every dragon's fire is fuel-based, and is different from species to species. Firepower is enhanced through combinations of unique sources of ignition and particular fuels. This can, however, be a weakness, as dragons aren't fireproof on the inside; an alert dragon can ignite another dragon's fuel the moment before the dragon itself does, causing the fuel to burn inside the dragon. The effect of this varies, from a slight daze to burning out from the insides.
Based on scenes in How to Train Your Dragon 2 when dragons of Berk and Valka's Mountain were released from hypnosis caused by Drago's Bewilderbeast and counterattacked this massive enemy together, possibly all the fire-breathers are capable of differentiating flames of normal and in explosive, ball shaped blasts.
In the expansion "Secret of the Leviathan" of the game School of Dragons, Phlegma mentions that dragon flames hit the target as one mass, except for the Flame Whippers, which lash their fire with their tongue.
The fire that the Armorwing produces is a combination of Oxygen and Acetylene, thus having a temperature of 3300 °C. It uses its fire to weld and create a metal armor to protect its scaleless body. While the Armorwing's fire is incredibly hot, it is also incredibly bright, as it can temporarily disorientate the vision of other dragons. The fire consistency looks similar to that of a Deadly Nadder's as it contains lots of sparks, only that it starts out as bright purple and gradually turns to yellow towards the end of the flame.
The Boneknapper has a fairly regular looking fire. Similar to the Red Death, this dragon takes a deep breath before breathing a huge flowing stream of ashy fire. It does not appear to have extremely hot fire since Hiccup, Fishlegs, Snotlout, Astrid, Ruffnut and Tuffnut, and Gobber were able to survive very close to the fire during the Legend of the Boneknapper Dragon short. Also, the fire keeps coming up and down in waves.
A Buffalord's fire is uncontrollable, and can explode in an instant.
Four Boulder Class species; the Gronckle, the Hotburple, the Crimson Goregutter and the Catastrophic Quaken, share this powerful ability. Their fires are very unusual ones, more like shooting compressed magma or volcanic rocks. These dragons first eat rocks or metals that melt in their stomach, and regurgitate and spit them back out as balls of molten lava. The substances they use to melt these rocks is Heptane/Oxygen. These lava blasts are shot out with great force and can cause serious damage once they hit their target. Attempting to block one of these blasts with a shield would probably not work. Because the blasts have a fairly solid base the blast will plow through obstacles until it hits something hard enough to splatter the lava ball. This is seen in Riders of Berk episode "Alvin and the Outcasts" when the dragons attack the Outcasts and proved to be effective even on big, strong foes such as the Screaming Death.
The Gronckle also has the ability to produce different types of lava by consuming different rocks. They can produce Gronckle Iron, lava of different colors, a transparent material, shiny balls of metals and even possess magnetic force in its body after eating certain rocks.
If a Gronckle ingests lots of small rocks or pebbles, it can quickly shoot them out before they completely melt and fuse with each other creating the regular lava blast. When it does this, the pebbles will be expelled in a rapid succession similar to a machine gun, though unlike a machine gun, these rocks will spread in a wide area. This attack is useful when attacking multiple foes at once, as seen on "Dragon Down".
See more information: Gallery: Gronckle.
Cavern Crashers are able to secrete a flammable green mucus from the craters on their backs. This slimy mucus becomes flammable when in contact with the air and is extremely sticky - virtually impossible to remove. They launch it onto their target with their body or tail before setting it ablaze. It can also set its tongue on fire and breathe out streams of green fire from its mouth like regular dragons.
Ironically, the Cavern Crasher is unable to secrete the slime under high temperatures, as the slime would be "cooked".
As seen in various sources throughout the entire franchise, Changewings have the ability to produce fire. The exact nature of these flames remain unknown, as they have only ever appeared in video games, 2D animations and drawings. On the occasions this fire breathing ability is presented, the flames extend in a concentrated stream, most of the time being different shades of yellow and orange, with one example of being blue.
The Deadly Nadder's fire made of magnesium, which burns at 3100 °C. It is said to be able to melt steel and turn a Viking into ash in seconds, and is claimed to be the hottest fire in the dragon world. Stormfly was able to burn an entire sea stack within seconds. The Nadder's fire, due to being made up of magnesium, looks like a torrent of concentrated sparkles. The Nadder seems to be able to breath fire without taking a deep breath, this seems to be a common ability among dragons. These dragons usually emit fires in an instant and the flames travel fast and straight, but they are actually capable of sustaining fires for long periods of time. Also, Nadders can sustain a low flame in their mouths to give off light and illuminate dark caves. However, due to its blind spot, they prefer to use their tail spines instead of fire. Stormfly has shown the ability to use an intense white blast of fire much more powerful than that of a standard Nadder.
The Dramillion has the ability to mimic the fire of any dragon it encounters. It can even combine the fires it has to create a powerful blast. It also has its own fire.
The Egg Biter is able to shoot blasts of blue fire, indicating either a very high temperature or a different chemical composition.
The Eruptodon is able to spew out lava that it has previously eaten.
Like the Monstrous Nightmare, they are capable of setting themselves on fire and glow in the dark at the same time. The fire that they emit is said to burn hotter than the Sun (which is 5505 °C), but this is likely metaphorical, since it would make Fireworms glow with a bright blue light. According to Tuffnut, the Fireworm burns like ten suns.
The tiny Fireworms are not shown to have any fire breathing ability but their skin is incredibly hot. In "Reign of Fireworms", tiny ones are known to set items on fire just by landing on them. They are shown to take some time - a few seconds or so - to heat up, when they do, they glow extremely brightly. This glow also intensifies when they come closer to other Fireworms, as seen in the episode "Race to Fireworm Island", and all their heat can be accumulated collectively.
One Fireworm however, Flashfright, can create a solar flap with powerful beats of its wings. This flare can temporarily disorient the sight of other dragons.
The Fireworm Queen is capable of breathing streams of hot fire (a similar type with the Monstrous Nightmare's fire; a bio-firecomb of topical and flammable gel) that spews out small fireworks. It is one of the most powerful fire weapon of all dragons. Their bio-firecomb, the fuel for its flame, can reignite Stoker Class dragons that cannot breathe fire. Their heat can also do so.
The Flame Whipper shoots swirling explosions of fire, aimed by its tongue for an increased accuracy.
As seen in "The Serpent's Heir", the Foreverwing breathes large amounts of highly viscous lava. This lava is powerful enough to destroy entire villages.
Unlike most dragons, which emit fire via their mouth, Gobsuckers release flammable gas through their rear behind. This ability makes it hard for anyone to sneak up on Gobsuckers as they will be attacked if they approach from behind.
This flames do not just serve the purpose of flames for a regular dragon, it also helps the dragon take off, gain speed and fly straight. Unique as this sounds, this flying mechanism poses some threats to the Gobsucker. Gobsuckers that run out of their shot limit will be unable to fly and as quoted from Gobber, "a downed dragon is a dead dragon". Furthermore, it may be difficult to attack opponents unless they are behind them.
The Grapple Grounder launches electrically charged pulse blasts at its opponents and are said to create beautiful waves in the sky as they shoot.
The Hackatoo ejects average ball-shaped fireballs at its opponents.
The Hideous Zippleback has one of the most interesting ways of producing fire. Unlike most other dragon who breath out a flammable gas and then ignite it while exhaling, the Zippleback has one head that produces the gas and exhales it while the other head creates sparks to ignite the gas. This gas is made up of Ammonium Nitrate mixed with Anhydrous Hydrazine, which has an explosive effect and produces a great deal of smoke. These chemicals produce a huge, flowing, green fog. The fog is said to have a noxious scent (this suggests it may be metabolic gas, like flatulence). It is bad enough to make anyone who breaths it in feel extremely nauseous. The gas, after being exhaled, is then lit by a spark from the other head.
The greatest benefit of this gas-based attack is that the green gas is diffuse at an incredibly fast rate, spreading throughout almost all areas. As such, the gas is able to seep into small, tight spaces, yet a single spark is still able to set of a chain reaction throughout the gas. As demonstrated by the Twins in "Crash Course", they were the only ones who could destroy a wall of seemingly impenetrable wall of rocks as the gas seeped in between the rocks, and when ignited, exploded from within the wall of rocks.
In addition, in battles, the Zippleback has the ouroboros-like power to bite their own tails and set themselves on fire, taking on the form of a flaming wheel that knocks down their opponents like ten-pins.
As seen in the comic "Dragon Down", both heads of a Zippleback are capable of releasing regular streams of fire. This fire looks somewhat similar to the fire used by the Red Death. Both streams of fire can merge together to form a larger ball of flames.
The Hobblegrunt shoots an Ethane expectorant. This suggests that this fire has a liquid consistency, similar to that of the Monstrous Nightmare. Ethane burns at about 1950 °C, suggesting a similar temperature for the Hobblegrunt's fire. Though the Hobblegrunt is rarely seen producing fire, it has been seen illuminating dark caves with with fire it sustains in its mouth.
The Hobgobbler produces and launches incendiary slobber that can burst into flames.
As seen in the Dragon Tactics feature of School of Dragons, the Hobgobbler can also produce a stream of normal fire.
When it hits a target it explodes on impact. The explosion is made up of a purple gaseous ring and a huge ball of fire at the center. The blast of plasma will explode even if it does not hit a target, because at high altitude, carbon dioxide is abundant and replaces the oxygen which creates the fire. The blast with no fire then explodes (as can be seen when Hiccup was riding Toothless for the first successful test drive). A Night Fury's flame can also be sustained for long periods of time, similar to a blow-torch. This is shown only when Toothless is preparing to rest or sleep, as he uses the sustained blowtorch-like flame to warm an area before laying down.
Toothless has been seen to use smaller blasts just to blow things over or illuminate dark areas. These blasts do not seem to be as hot as his regular fireballs, and it is very likely that he can control the relative strength and heat of his blasts. Toothless seems to refrain from using the hotter, more lethal blasts against enemies when he can help it. This is almost certainly due to Hiccup's influence on him. The Night Fury is also known to breathe a stream of normal fire, at least for supplementary uses.
As for the Light Fury, it uses its plasma blast not just as a weapon, but to help it cloak itself with its surroundings as it flies through the fiery explosion.
The Moldruffle shoots out massive, powerful balls of fire. Moldruffles gather fire on the edges of their tails and wings, using their fan-like tails to strengthen the flames.
The Monstrous Nightmare has some of the most dangerous fire. It consists of kerosene gel, so unlike other dragons which secrete various forms of gases, they produce a green flammable gel and ignite it. When the Monstrous Nightmare shoots fire, the base appears as a viscous liquid. This fire is very destructive as it flows over houses and fields, but it actually doesn't seem to be particularly hot, as Hiccup is able to stand relatively close to it when he is being attacked with this fire. Because the fire is sticky, the Monstrous Nightmare often coats itself in it - another possible sign that the fire isn't all that hot, as Hookfang's fire coat causes discomfort but no real damage to people sitting on even a full burn. It should be noted that when using their firepower they are always seen spewing it over a target as opposed to blasting it, or when they blast it it is usually at short-range.
Hookfang can create a condensed ball of flame with greater destructive power by igniting himself and flying while breathing fire in circular motion.
A single Night Terror normally emit small streams of flames, but when they swarm together, the flames will combine and transform into a massive, powerful fireball.
Similar to the fire types of the Red Death and the Boneknapper, the Purple Death breathes a extremely large blast of regular fire. Their fire, however, does appear to extend in streams, encircled by a ring of fire.
The Raincutter has a truly unique fireball. Its fire is rain-resistant and is equally as powerful in rain, snow and sunny weather. However, it looks like a regular fireball.
The fire that the Razorwhip breathes can burn the flesh off a human from a hundred feet away. The bright blue color of the fire may either indicate a very high temperature or a different chemical composition. Their bright blue fire explodes on impact, leaving sparks flying. They can shoot many times rapidly and are incredibly precise.
Red Death and Green Death
The Red Death is a tremendous dragon, and its fire is equally massive. One blast incinerates the entire Berk fleet, and travels a distance of 2640 feet. It is a methane-based, billowing orange flame, and it contains more soot than most other dragon flames, similar to pyroclastic blast of a volcano. Being methane based, this flame burns at 1950 °C. The Red Death inhales deeply before shooting fire. Directly after being ejected, the fire is a blue hue, but it quickly turns to orange. The dragon can cover the lack of agility and blind spots from faster or smaller enemies by flipping in midair in three-dimensional circular motions, resulting in engulfing the surrounding area and searing the targets. It can also be powerful enough to destroy the dragon itself completely from within, if its fire is ignited by another dragon.
The Green Death, despite being a close relative of the Red Death, produces a fire consisting of smaller, dense balls of lava instead of continuous flames.
The Rumblehorn expels long-ranged "fire missiles" which initially start out as a white-hot fireball that quickly solidifies and turns to a warmer color before it ends up in a sooty stony material when it hits its target. It is also capable of breathing normal flames.
The Sandbuster shoots super-heated sand that becomes glass on impact. However, according to Dragons: Rise of Berk, it shoots molten glass which solidifies on impact, trapping its prey, similar to how a Death Song does with its amber.
The Sand Wraith has a unique fire type. It ejects large balls of hardened sand surrounded by a coat of weak fire at its opponents. In School of Dragons, their fire appears to just be a rock that explodes into tiny bits of sand in mid-air.
The Screaming Death's fireballs can be launched either one at a time, or in rapid succession, much like a machine gun. Every time it launches a fireball, the frill on the Screaming Death's head flashes with flames (much like a gattling gun) and the fireballs themselves explode on impact in an incendiary fashion. Alone, these fireballs are also shown to be extremely powerful, as one of them was able to obliterate a tower in Berk in one shot. The Screaming Death is also capable of jetting out "concentric rings of fire matching the round shape of mouth" which are identical to those used by the Whispering Death.
The Scuttleclaw can shoot green fire. School of Dragons states that is contains copper. In School of Dragons, the Scuttleclaw releases orange fireballs that explode in midair. Its fireballs appear both orange and green in color.
The Sentinel produces a funeral pyre fire, according to Dragonpedia. It looks similar to a Monstrous Nightmare's and it can ignite Zippleback gas.
In Dragons: Rise of Berk, the Shadow Wing shoots balls of molten lava, similar to Boulder Class dragons.
The Shellfire launches massive plasma-charged boulders from its mouth. Its firing range can be over a mile, and it can launch multiple boulders simultaneously.
Like many other dragons in Valka's Mountain, Shovelhelms have been trained to breathe fire to illuminate dark caves. This dragons sustains yellow flames in its mouth to light up the caves or cook fish.
Singetails are able to launch scarlet fireballs from their mouths, gills and tails. Singetails are described to hurl balls of fire from their tails for long ranged attacks but prefer releasing jets of fire from their gills for close ranged attacks. This makes it virtually impossible to sneak up on a Singetail from the front, back and underneath, making it one of the most formidable fire-breathing dragons.
Though initially mistaken for marking their territory, Singetails set fire to foliage to signal for help from other Singetails.
As shown in Dragons: Rise of Berk, the Sliquifier is able to shoot balls of fire in quick succession, similar to the Screaming Death.
The Slithersong breathes rings of white fire, similar to the Whispering Death.
Small Shadows spit balls of molten lava that can explode into orange fireworks.
The Smothering Smokebreath breathes a very hot fire. It is so hot it able to weld or melt hard metals together. This means its temperature is about 1510 °C. The hot air may function similarly to a hot air balloons fire.
The Smothering Smokebreath also emits large amounts of smoke from its skin to create a thick cloud of smoky fog to hide itself. They are often mistaken for ghosts and other supernatural creatures, such as a "Fog Monster". And according to the Riders of Berk DVD extra, "Dragon Tracker", the smoke is emitted from their skin much like the Monstrous Nightmare's fire jacket.
The Snafflefang breathes brightly-colored fire that can be used to illuminate dark caves.
Snaptrapper emits a Methane based mist. Since methane is a flammable gas it is assumed it can be set on fire in a similar manner to a Hideous Zippleback's gas.
The Snifflehunch is described to have a fire sneeze that can melt almost everything.
It is released as a green mist which forms into a ball.
The Stormcutter shoots a sustained, blazing torus of fire.
As seen in a deleted scene for the second movie when Hiccup tries out some of Cloudjumper's fuel in his fire-sword, this fire is extremely powerful and difficult to control.
In School of Dragons, the fire, however, appears to burst into a blue or purple ball of flame on impact.
One individual, Reignstorm, breathes streams of blue fire.
In Dragons: Rise of Berk, the Submaripper shoots out balls of fire.
In Dragons: Rise of Berk, the Sweet Death shoots powerful streams of fire.
The Sword Stealer ejects powerful streams of fire at its prey and enemies. Its fire emerges as a orange stream, with a white core, but turns green upon impact. This may indicate the presence of copper in the fire.
Terrible Terrors have a Propane-based fire attack, having a temperature of 1980 °C. This fire was described more as sniper bullets than flamethrowers. Their fire projects in long concentrated streams with deadly precision. Their accuracy in shooting is displayed by Sharpshot when he managed to fire three wooden targets mid-air when launched into the air.
Gobber says that you know when their about to strike when you hear a little hissing sound.
Thornridges eject powerful streams of green fire. It appears yellow upon release, but gradually shifts into green. This may suggest the presence of copper in its fire.
The Threadtail can breath normal, yellow fire, which can be held in its mouth to illuminate dark places.
In Dragons: Rise of Berk, however, the Threadtail's flame appears to be small plumes of light green flame that slowly spread out.
The Thunderclaw releases a loose, but continuous stream of yellow or green flames, but is also capable of shooting green fireballs. This might suggest the presence of copper in the flames.
The Thunderdrum has been stated to be able to produce blasts, or waves of blue fire that gradually expands over the travelled distance. These fire blasts travel at the speed of sound, making them hard to evade. The downside to this power is that it takes a lot out of a Thunderdrum to employ it, so it's not often used. This fire's blue color might indicate a very high temperature or a different chemical composition.
The Thunderpede emits short streams of fire. This fire is concentrated, but relatively weak and does not spread.
The Timberjack spits a fire similar to the Monstrous Nightmare's. It is slightly more sticky and globulous. It resembles burning embers and create beautiful glowing sparks. The Timberjack will occasionally secrete a few drops of its oil-based fire to burn the kindling wood it has chopped and collected. It can, then, fold its wings around the fire like a tent to warm itself, just as it's seen on the Book of Dragons short. Unlike other dragons, it is known to be able to attack more targets over a greater area with its fire nova in battle, ejecting multiple fireballs simultaneously.
The Triple Stryke shoots intense, concentrated blasts of fire that can blind its opponents. The fire is orange in color and appears to be very dense and can still burn in wet and damp air, suggesting the presence of a natural accelerant not unlike gasoline. Though its fire is very powerful it also requires a lot of energy, so the Triple Stryke prefers to use its venomous tail stingers.
The Typhoomerang flies in a scorching tornado of whirling fire. When Typhoomerangs spiral into the air while scorching the ground, they are capable of creating a huge whirling burn mark with their fire. This is known as the "Flaming Cyclone" by Dragons: Rise of Berk. This act is used in battle and courtship.
They have also been shown to be able to spin and wrap their wings around themselves in the air while releasing a stream of fire that swirls into a large combustive ball of fire. This was demonstrated by an agitated blue Typhoomerang in "The Eel Effect" and was powerful enough to knock heavy dragons like Meatlug away in the air.
The Typhoomerang also possess the ability of leaving a trail of sparks as it flies, this ability was demonstrated by Torch in the Academy. This was likely Torch's attemt at the Flaming Cyclone. The fire also acts like a fertilizer, because once the plants are burned by the fire, they will regrow and become more fertile.
The Typhoomerang's fire takes the shape of a flaming tornado, and is 'hollow', thus it can burn anything except for those that fly through it.
The Whispering Death's fire takes the form of a succession of rings encircling a thin stream of fire due to its rotating teeth and circular mouth. As seen in Darkest Night , the shape of these fire rings allow Toothless to fly through the middle, similar to the Typhoomerang. It also has the ability to spit normal fire as seen when Whispering Deaths attacked Bork and his wife from underground. However, its fire does not seem very hot as Gobber managed to block it using a wooden shield in "Tunnel Vision". Though, those Whispering Deaths were young and their fire may have been weaker than an adult's.
The Windgnasher is able to shoot balls of green fire, similar to the Thunderclaw.
The Windstriker is capable of ejecting powerful streams of superheated air, used to illuminate caves or warm up masses of water.
In Dragons: Rise of Berk, the Windwalker shoots balls of fire.
In Dragons: Rise of Berk, the Woolly Howl is able to shoot multiple balls of yellow fire in quick succession.
The Bewilderbeast have ice blasts as their firepower which are the most powerful and destructive of all biological ranged attacks in the world of How to Train Your Dragon. They suck up masses of water from the sea and store it in goiters on its neck. The water is then likely highly pressurized, while the volumes combined heat is driven or wicked off. When it regurgitates the water, it returns to atmospherical pressure and experiences a drastic drop in temperature. This supercooled water then freezes on impact, forming protruding spikes. The Bewilderbeast can also exhale a small, frosty breath.
Their icy blasts are able to destroy villages and huge forts. Bewilderbeasts mainly use their ice to construct warm habitats for dragons to live in. This results in a large spiked mass of ice when viewed from the outside. However, on the inside, their ice can sustain the growth of plants and the formation of large bodies of water while keeping the temperature relatively high, as shown in Valka's Mountain.
The Groncicle freezes its targets with exploding ice attacks of liquid nitrogen. Liquid nitrogen can reach temperatures down to -196 °C. This causes the Groncicle to have a very low body temperature, causing the water around to freeze as it swims.
In contrast to School of Dragons, Dragons: Rise of Berk claims that Prickleboggles have a cool, icy blast. Considering they have icy breath, it is possible their healing breath is also cold to soothe the pain and inflammation of injuries, like placing an ice pack on the wound, along with being medicinal.
As seen in the Brawl mode of Dragons: Rise of Berk, a Raincutter is able to shoot balls of water at its opponents.
The Scauldron first swallow gallons of water, heat it in their stomach, and then fire the water in a scalding jet at its prey/victim. The dragon gets its name from this ability. The water it spits is extremely hot and will usually finish off its victim with a single shot. Gobber claims it will melt the flesh right off your bones. The scalding water blast can also peel the scales off of a Screaming Death.
The Scauldron may be able to demonstrate the ability of breathing fire, as some Vikings who have survived encounters with these dragons tell of smelling the flammable gas that comes before flames as the Scauldron was readying for its attack.
The Shivertooth fires frost. It is released in a thick stream and appears to have many ice particles in it.
Though Dragons: Rise of Berk previously mentioned that Snifflehunches have a fire sneeze, one individual, Sneezlehunch, is described to have an icy sneeze after dwelling in icy climates.
The Snow Wraith is able to shoot frost in quick, rapid fusillades at numerous targets. Their frost is emitted in thick, concentrated blasts that seem to glow as it emerges from the dragons' mouth. This attack is exceptionally powerful and destructive, as it can easily blast a Viking out of his spot. The Snow Wraith can eject these blasts at an immense speed.
The Tide Glider sprays water which is contaminated with its saliva which can heal wounds. The water appears misty and consists of visible droplets. The Tide Glider is able to release both streams and concentrated balls of water.
According to Dragons: Rise of Berk, the Windgnasher has an icy blast and even has a "blizzard attack," a very powerful icy blast with whirling winds.
The Woolly Howl shoots hailstones, as shown in School of Dragons to be sustained in a swirling spiral shaped blast or a shower of hail.
Being in the Strike Class, it can fire its highly explosive Ice blasts from a great distance with a lot of power and pin-point accuracy. Like many other dragons, the Woolly Howl can control the force of its blasts.
The Changewing's acid is green, gurgling, sticky, and melts through most substances. They can spray large amounts of acid at a time. It is highly dangerous and is shown to eat through huge trees in seconds, however, it cannot destroy most metals. The dragon is immune to its own acid as it can walk through and be covered in it without showing any signs of pain. The game Dragons: Rise of Berk, states that this acid is strong enough to burn through wood, rock and even Vikings. It is later shown that Changewing acid can melt dragon-proof metals despite being unable to burn through more common metals such as Snotlouts helmet. The acid is also highly viscous and can stay intact in deep water.
Deathgrippers are able to blast a highly corrosive green acid that can burst into flames, and it can melt wood, stone and metal in a matter of seconds.
In addition to its fire produced by its rear end, the Gobsucker also has a powerful acid blast that can eliminate enemies quickly. However, this is its secondary fire type and Gobsuckers rely more on their fire.
The Submaripper shoots exploding balls of acid which is usually shot within a close range, but has great power.
The Sliquifier can use it's speed to churn up a powerful acid stream. This is unusual, since most dragons that fire acid do so in a ball shape that has a direct impact on targets. The Sliquifier's acid becomes stronger as the dragon moves faster at the point of release.
The Snaptrapper shoots a type of acid that can melt through metal. They appear as large streams of green acid.
In School of Dragons, Speed Stingers have green acid blasts.
The Sweet Death fires acid while it usually stays put in one area. Their acid is dark orange or brown. When fired, their acid is usually released in a concentrated stream before bursting into many droplets.
Along with it's watery firepower, the Tide Glider can shoot several balls of acid simultaneously to clear it's path. They appear as large balls of green acid.
As seen in Dragons: Rise of Berk, the Triple Stryke is able to shoot green streams of acid out of its tails. However, this ability was never seen outside of the game, in the show the dragon only injects venom from its tails, but not acid.
The Grapple Grounder can shoot a light-blue pulse ball, possibly of electricity or plasma. It can shoot multiple of these blue orbs simultaneously, but with a constant decrease of size. The balls have a sort of magnetic field, gravitating towards larger bodies (ie, opponents or victims), however the smaller the size, the stronger the force. This information could also infer it might be electromagnetic. If a Grapple Grounder takes a deep enough breath, or charges it long enough, the fire will come out as a big blackish sphere that explodes impressively upon impact, almost fatal. Its bomb contains Magnesium gel.
The Seashocker, utilizing the ability to produce bioelectricity, can attack and stun targets at mid-ranges with highly-charged electron waves or currents. They bite their prey with their electrical bite, stunning and paralyzing them. It also uses its electrical ability as a defense mechanism from predators. Seashocker can direct its electricity from one head to the other and this results in a bright sparks produced in between their heads, like that of a Wimshurst machine. Also, Seashockers are able to generate such a large field of electricity that it can knock many large Scauldrons away in water.
The Shockjaw can shoot an electrical stream of bio-electricity. The power of this electricity ranges from a gentle jolt to a lethal bolt. It is described to feel "up-close and personal".
The Skrill shoots an electrical white fire, known as a lightning blast, as its body crackles with static electricity. As soon as the dragon begins to breathe its lightning-like breath, the electricity arches through its mouth and sparks along the gases that form the body of the blast.
It is one of the most unique types of blasts since it contains both an extremely hot fire and a powerful electrical current. It also creates strong ozone smell, due to the air ionization during discharge. Though the huge amount of electricity is fatal, Snotlout and Dagur were hit by the Skrill without dying or passing out like Hiccup when he was hit by actual lightning. This may suggest that the lightning that Skrills produce are of a lower voltage than actual lightning. Or it could just be the size and power of different blasts. For example, the Skrill can shoot lightning powerful enough to bring down an iceberg.
Though most Skrills' flames appear white or blue, in Dragons: Rise of Berk, Hunterbolt ejects orange, yellow lightning from its mouth. He also releases waves of orange electric pulses around it and his body starts to emit light. Unlike other Skrills that have to draw lightning to themselves before absorbing it and striking, Hunterbolt can directly control lightning. Occasionally, lightning strikes at a specific spot of his habitat.
Just like the Skrill, the Windwalker is covered in lighting and is able to shoot it at its opponents.
The Bewilderbeast is known to produce ultrasonic sounds to control the minds of other dragons. The only dragons immune to it are baby dragons as they "listen to no one".
Boneknappers have a thunderous roar, but this requires it to have all of the bones in its armor. It can also be used as a mating call.
The Death Song uses a siren like sound to lure its prey to a remote island. The Death Song has an extra-cervical vertebrate. When the Death Song calls, its extra vertebrae expand into its frills, and its song is able to be projected to specific targets up to a mile away. Thunderdrums are the only dragons immune to it as they are hard of hearing.
The Mudraker produces sonic sounds that travels through water in fast speeds and causes the water to form into massive, powerful waves. In School of Dragons, they appear as waves of blue rings.
The Screaming Death is able to produce a loud noise that disorients dragons, causing them to lose focus and feel very uncomfortable.
The Shadow Wing can produce a loud, powerful roar that can disorient humans and dragons, as well as affecting its surroundings. The roar is also a signal for Small Shadows to attach to its wings to form the dragon's iconic bomber formation.
The Thunderdrum is capable of delivering a thunderous sonic blast that can be heard and felt for miles, as well as being deadly at close range. This blast is so loud it's been known to shatter glass and crack teeth. The blast ripples through the air and can push obstacles and enemies back at great speeds, as well as reflecting small projectiles making it both a defensive and offensive weapon. It has been proven strong enough to break off the main mast of a ship, send a horde of wild boars flying, knock an agitated Monstrous Nightmare off the air and collapse entire hill sides. It is theoretically possible that the sonic roar would be more effective against targets that are underwater, as water transmits water better than other mediums. According to the legends, the Thunderdrum gets this power from Thor himself. When Thunderdrum babies hatch from their shells, they make a sky-rattling sonic boom.
Some dragons seem to be immune to its roar or only slightly affected by it such as the Whispering Death. However, by focusing its sound into a more concentrated form, the Thunderdrum can release a sonic blast than can do more physical damage. As shown with Stoick's dragon Thornado, this can either knock down juvenile Whispering Deaths, or even briefly stun a Screaming Death. When several Thunderdrums cooperate, the combined blast is powerful enough to knock off many wild dragons instantly.
The Windstriker heats air up in their body, then blasts it at its enemies. Its super heated air is one of the most powerful strike of all dragons. These blows are hot enough to set their opponents on fire.
The tail of a Flame Whipper contains an acidic poison that can paralyze for a short while.
The Slitherwing coats its body with poison that is lethal to anything that touches it. They also have the ability to spray venom from their fangs like Spitting Cobras.
The Threadtail has the ability to secrete poisons from their skin, which is extremely lethal to any living organism, being the strongest poispon of them all. This ability mimics that of a Poison Dart Frog. However, the Threadtail is allergic to the poison and has to roll around in Dragonberry bushes to relieve the itch.
The Death Song shoots amber-like substances that solidify rapidly to trap its prey. This substance appears to be shiny and is normally seen as large orange blobs with dragons and unsuspecting prey trapped in it. This amber is so strong that dragons, including a Night Fury, could not break the solid substance with its jaws. This substance can only be penetrated by flame as it causes it to melt into a liquid.
The Flightmare shoots a toxic glowing blue mist that paralyses its victims just long enough for it to finish them off. Rather than freezing a target immediately, the initial paralysis seems to be caused by "stiffening" the skin, making it harder for the muscles to work. As the skin absorbs the mist, the muscles themselves are paralyzed. The victims appear "shiny" until the mist wears off, possibly because of some elements of the mist are not absorbed by the skin and have to dry off.
Grim Gnashers have the ability to launch their razor-sharp teeth from their mouths like darts. These teeth can penetrate through wood and the Grim Gnashers can regenerate them throughout their lifetime, similar to sharks.
Prickleboggles can inflict minor damage with their blast, however their blasts are also known to have impressive healing properties. Their blasts consist of small purple particles suspended in a purple mist. They use these abilities to cure other dragons and they, in return, stay loyal to the Prickleboggle. They are able to calm and relieve others in chaos. With these talents, Prickleboggles have many close allies and bonds with others.
The Silkspanner creates silk similar to those of a spider to weave webs and trap its prey in it.
Submarippers vomit the shipwrecks they have ingested, spraying their targets with harpoon-studded debris.
Similar to the Flightmare, a Threadtail individual, Mildew's Strain, can produce a purple mist. This mist leaves shimmery purple puddles that appear to be of the same shade as the Dragonberry bushes Threadtails are fond of.
Fire or Attack Combinations
In "Heather Report, Part 2", Astrid and Snotlout combined the attacks of their dragons. Hookfang would set himself on fire and fly across Stormfly's path right as she launched her spikes. When done correctly, the spikes would set on fire as they pass through the fire jacket, making it even more important to get out of the way.
Monstrous Nightmare and Fireworm Queen
When both these formidable dragons come together, they start to combine firepower. The result is a gigantic field of flames of incredibly high temperature, and when fanned out, the flames are capable of incinerating everything in front of them.
In "Live and Let Fly", Hiccup and Stoick fought against an armada of Outcast ships, and Hiccup noticed that Toothless's plasma burst combined with Thornado's sonic roar makes a fireworks display of purple sparks. He called it a "Plasma Scatter-shot".
Night Fury and Skrill
In "A View to a Skrill, Part 1" and "A View to a Skrill, Part 2" Toothless fires a Plasma Blast at the Frozen Skrill, but the Skrill fires back with its lightning. The reaction causes a small concentrated ball of plasma and electricity of high voltage, which collapses inwards due to the pressure and heat, resembling an interstellar nebula. This sends out a spherical shock wave, creating a purple plasma lightning explosion.
This blast is extremely powerful as it is was shown to be able to knock out up to three dragons in the air.
Hideous Zippleback, Monstrous Nightmare, Gronckle, Deadly Nadder, and Night Fury
In "Twintuition", Toothless, Stormfly, Meatlug, Hookfang, Barf and Belch combine their firepower to successfully destroy dragon-proof metal.
Deadly Nadder and Gronckle
Hideous Zippleback and Deadly Nadder
In the second film, Barf and Belch were seen releasing masses of gas with Stormfly igniting it with her fire. This is rather useful as Zippleback's gas is highly flammable and all it takes is a single spark to ignite it. With a Nadder's hot magnesium flame that is believed to be one of the hottest flames produced by a dragon, this causes a thick and hot stream of fire hot enough to melt metals.
In How to Train Your Dragon 2, many dragons fired their shots up into the sky simultaneously. This resulted in a gigantic orange cloud of fire and smoke in the air. Sparks fly out of this mass of fire and it releases a circular shock wave of smoke and a large explosion.
The dragons' fire included in this explosion are: Deadly Nadder, Monstrous Nightmare, Gronckle, Hideous Zippleback, Hotburple, Rumblehorn, Stormcutter, Terrible Terror, Shovelhelm, Hobblegrunt, Snifflehunch, Threadtail, Thornridge, Thunderclaw, Scuttleclaw, Raincutter, Snafflefang, Windgnasher, Windstriker, and four other Unknown Dragons.
Eels have been shown to affect dragons fire differently. For a Night Fury, for instance, it creates a red plasma shot that explodes on impact and it increases the shot limit. This comes at the cost of the dragon getting Eel Pox (which is why most dragons avoid eels). Typhoomerangs on the other hand can consume eels to increase their shot limit and fire power without contracting the disease.
Non-Projectiles / Special Weapons / Unique Attacks
Used by the Deadly Nadder, the Razorwhip, the Whispering Death and the Screaming Death. It was used for various purposes and poison attack.
Used by the Gronckle. When provoked, Gronckles can inhale deeply, and the bumps on their body blast off in every direction.
Used by the Gronckle, the Hotburple, the Snafflefang, and the Red Death, they get close to the targets and beat them using thir morning star shaped tails. It is very powerful and can knock over several Vikings at once. Their tails usually have spikes or bumps on it.
Used by the Monstrous Nightmare and the Moldruffle. They can set their bodies on fire to cause conflagrations on buildings or forests.
Used by many dragons that can use their tail to whip enemies.
Used by the Whispering Death. It can rotate its teeth in one direction to allow it to burrow through ground and rock, while it can rotate them in the other to produce a vacuum effect that sucks prey into its mouth.
Due to having massive lungs, the Red Death and the Screaming Death can create powerful air currents to suck in smaller dragons, such as Night Furies or Deadly Nadders.
Used by the Speed Stinger. It uses the barbed end of its tail to inject poison into its victims to paralyze them temporarily.
Used by the Seashocker, they can paralyze their victims through their bite, using a powerful electrical discharge.