Raincutter

The Raincutter is a Sharp Class dragon that first appeared in How to Train Your Dragon 2.

Official Description
"This long-necked Sharp Class Dragon LOVES rainy days. The wetter, the better! That's when it does its best hunting and foraging... for wiggly worms. Yuck! The Raincutter might prefer to hunt on rainy days, but its fireballs fly true no matter what the weather."

- Dragons: Rise of Berk

Egg
Raincutter eggs are lavender with dimples all over the surface. The egg also has blue bubbles covering it, though it is unknown what use they serve.

Hatchling to Adult
The Raincutter looks like the Scauldron, but it has sails on its back and head like the Speed Stinger. The Raincutter's size may also be comparable to the Scauldron. It has a big rounded body, a long tail and a long neck with out the nasal horn. Its first pair of legs are small. Its nose horn is similar to the Deadly Nadder's, but smaller and its chin looks like the Hobblegrunt's. The Raincutter's lower jaw is very massive and armored. This dragon's teeth is very similar to the teeth of a Hobblegrunt.

Titan Wing
Despite a few differences here and there, one could say that a Titan Raincutter looks very similar to that of an adult one. Titans' body color starts to take on a more luminous, brighter hue of blue. Stripes of a darker blue-green color run down their back and over their wings. Their wings are larger and appear to be spinier and sharper, and their edges are tinted pink, together with the sail on their head and the spikes on their back. The tentacle-like structures on their chin also grows longer.

Fins
The Raincutter has aerodynamic fins that helps it fly more efficiently. These fins are also used for offense.

Long Neck
The Raincutter's long neck enables it to pick up any grubs or worms in the dirt and mud.

Rain-resistant Fire
The Raincutter can breathe fire, and its flames are capable to stay alive in wet and damp air during a rain or a storm.

Behavior and Personality
Raincutters love wet, rainy places. It brings up the worms and grubs from the ground for them to eat. Like the Scauldron, these dragons dislike hot weather and the species are fairly similar. However, it is unknown if the Raincutter lives in the water.

Raincutters are known to be extremely loyal and grateful to their riders. Thump, was said to be forever grateful to Valka for rescuing her and often gets slimy grub snacks as gifts.

How to Train Your Dragon 2
The Raincutter was first seen in Valka's Mountain lighting up the dark caverns with its fire. Next, Valka introduced Hiccup to Thump, a disabled Raincutter whose wing was sliced off by a razor-net.

Dragons: Rise of Berk
Raincutters and their Titan Wing form are available in Rise of Berk, along with individuals like Thump and Puddlemuck.

School of Dragons
Raincutters also became ride-able in School of Dragons.

Trivia

 * If the Raincutter lives in water, it's behavior and swimming posture should be similar to that of a Spinosaurus. Even more fascinating, they both have a sail that both species use to swim with.
 * The Raincutter was created using a modular system to mix and match preset body parts onto different dragons. It was created from the same base that was used for the Hobblegrunt, Windstriker, Thornridge, Threadtail and two other Unknown Dragons.
 * It seems that these dragons have very massive and armored lower jaws.
 * The Raincutter is the only known dragon that eats worms and grubs.
 * Even if in How to Train Your Dragon 2, the Raincutter is clearly a large dragon, in Rise of Berk it is smaller than Toothless' size.
 * The Raincutter seems to have a small beard on the bottom of its snout, though those could very well be spots or even holes for different purposes.
 * Even though the Raincutter is a Sharp Class dragon, its behavior resembles more of a Tidal Class dragon.
 * In Rise of Berks Champions of Berk update the Raincutter shoots water balls instead of fire, though they still shoot normal fire in Battle Mode.