In terms of appearance, the Devilish Dervish actually looks very much like an ordinary western dragon, with two wings and four legs. They are described as a superb, shining creature, and have long spikes down their lower back.
Devilish Dervishes are very bold and quick to take action, as well as rather difficult to control.
Although no stats are given for the Devilish Dervish such as "Disobedience", this dragon is trainable and has been used as a beginner's dragon for those that can handle it.
The Devilish Dervish is first mentioned in this Book, as a starter riding dragon for Snotlout.
|“||Snotface Snotlout was riding the best dragon there, a smooth, evil-looking Devilish Dervish.||”|
|— How to Twist a Dragon's Tale|
Devilish Dervishes are mentioned in this reference book and appear in the dragon information tables in the back of the book.