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How to Train Your Dragon Wiki

The Moldruffle is a medium-sized Stoker Class dragon that first appeared in School of Dragons. At a later date, this School of Dragons original dragon appeared in Dragons: Rise of Berk as an individual (exclusive) dragon named "Moldruffle" which was identified as a Common Rockstomper, a Tracker Class dragon.

Official Description

Rockstompers have a tradition of burying hidden caches of supplies under the sand, including the belongings of Vikings, much to their riders' dismay.
There's no hiding from this Dragon! Rockstompers can track down anything, including their enemies in the heat of the battle.
  — Rockstomper description in Dragons: Rise of Berk  
This Rockstomper's tracking skills came in handy when Snotlout and Hookfang landed on its island. Moldruffle found them fresh water deep underground by using its horns as a divining rod.
  — Moldruffle description in Dragons: Rise of Berk  

Physical Appearance


Moldruffle Egg.png

The Moldruffle's egg is shaped much like a bird's. It has several curved ridges that slop towards the base of the egg that make it look somewhat like a pine cone or a sea-patterned, carved wood with bright orange and red light glowing from it. The color of the egg determines the color after the dragon hatches.

Hatchling to Adult

The Moldruffle looks a lot like the Snafflefang in terms of appearance and build. They are talented flyers. The Moldruffle is a dragon that actively and effortlessly hunts prey other than fish. Its head is shaped to be like a hunter, rather than a scavenger or fisher. The spikes on its back are unusual, since most dragons with spikes have a neat and smooth pattern. The Moldruffle has a random pattern of varying spikes. These spikes can be effective weapons for defensive purposes. They also seem to have talons at the tips of their wings which they ignite during their special ability, these talons may also be used for an offensive purpose.

In Dragons: Rise of Berk, the Rockstomper looks similar to the original design, however, is purple in color with lilac spots.

Titan Wing Moldruffle.png

Titan Wing

Titan Wing Moldruffles are red in color with blue and red stripes on their wings and blue stripes on their back and tail. They have more black spikes on their backs.



The Moldruffle is an excellent hunter, and it has sharp, long-range vision to help spot its prey. They are intelligent cat-like dragons in their natural behavior, with keen hunting senses. They are also described as being 'wonderfully curious'. They are quick and precise and can glide through strong winds.

Speed and Stamina

These dragons have an aerodynamic build, making them quick and extremely agile hunters. They also have a lot of stamina and are known to travel great distances.

Horns and Talons

The Moldruffle also has quite an unusual way to communicate with others of dragons of its kind. The Moldruffle's sharp horns resonate a pure sound when struck against objects and this is used to send a message to its dragonkin. It can also use its horns as a deadly weapon. It has talons at the edges of its wings which it can use as an offensive weapon.

According to Moldruffle's description in Dragons: Rise of Berk, its two main horns can also be used for divining rods to find water underground.

In School of Dragons: Dragon Tactics, the Moldruffle's headbutt attack poisons the target, meaning that thier nose horn possibly contains venom of some sort.


The Moldruffle is able to shoot a huge, powerful fireball, which is known to have immense strength.

The Moldruffle with its wings and tail on fire

The Moldruffle's signature ability is when they gather fire on the edges of their wings and tail, using their fan-like tail to strengthen the blazing flames, much like the Monstrous Nightmare. Imagine the terror of seeing a fiery inferno diving at prey with incredible speed and precision! Since they are able to travel great distances, this would mean their ability would be extremely powerful over time as it strengthens the blaze with its fan-like tail.


As a Tracker Class dragon in Dragons: Rise of Berk, these dragons are said to have superb tracking skills, including tracking enemies.



The Moldruffle's number one (and so far its only) weakness is the fact that it is easily distracted, so some of the Berk Dragon Riders could distract a Moldruffle while the others captured it if it ever became a problem.

Behavior and Personality

The Moldruffle is incredibly catlike in nature. They are intelligent and curious. Its keen senses are quickly distracted, and it switches it's focus from one thing to another. They are also stealthy and sneaky, other traits associated with cats, as seen with Dirt-Hurler's battle strategy and Jewelbilant's sneaking of shiny objects. They are also excellent trackers, not merely of scent, but of visual cues such as animal tracks. Turfraider is particularly adept at this skill. Moldruffles are also mentioned to have a quick and fiery disposition.

Moldruffles may have a varied diet. Not only are they hunters, but they do not seem adverse to eating Glowing Algae or other food stuff contaminated with it, as demonstrated by Greenkeep.



Dragons: Rise of Berk

Following its debut in School of Dragons, the Moldruffle appeared in the game as an exclusive individual, while the species was named the 'Rockstomper'. The common Rockstomper, however, is purple in color. Dragons: Rise of Berk classifies the Rockstomper as a Tracker Class dragon. The individuals Greenkeep, Exotic Moldruffle, Dirt-Hurler, Jewelbilant, and Turfraider were introduced later in the game, as well.

School of Dragons

The Moldruffle is an original dragon of School of Dragons, and is classified as a Stoker Class dragon.

In addition to the dragons the player may obtain, Moldruffles appear at the explorable location The Tempest in the Expansion "Rise of Stormheart". They, along with a Titan Wing Gronckle, do not have a known purpose as yet, but appear to be generating the energy to steam-power the ship.

Dragons: Titan Uprising

Rockstompers are briefly mentioned in the description of the Brush Nadder.

Brush Nadders are abundant in the Berk Forests, almost as common as Rockstompers.
  Dragons: Titan Uprising  


  • Moldruffles are one of the few dragons that favor land creatures over sea food.
  • Its head resembles the figurehead for the Outcast ships, though their skulls are shorter.
  • With the exception of their heads, the Moldruffle's design is nearly identical to the Shovelhelm's.
  • In the book DreamWorks Dragons: To Berk and Beyond! and in a tweet from Richard Hamilton, the Rockstomper is classified as a Tracker Class dragon.


Moldruffle uses Creative Commons Licensed content from the Rise of Berk Wiki page Rockstomper. The list of authors can be found on the page revision history (view authors). ROBWiki Logo.png
Moldruffle uses Creative Commons Licensed content from the Rise of Berk Wiki page Moldruffle. The list of authors can be found on the page revision history (view authors). ROBWiki Logo.png
Moldruffle uses Creative Commons Licensed content from the Dreamworks School of Dragons Wiki page Moldruffle. The list of authors can be found on the page revision history (view authors). SODWikiLogo.png

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