Failed attempts to experiment with magic often result in transforming dragons into these hellish creatures. They are extremely dangerous, and will mindlessly kill any living creature without regard to friend or foe.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

But I'm Still Here is very angry at being made into a zombie dragon.  He has to be contained by all Taliax's red dragons' forces combined to stop him from destroying everything in his path.  When he gets too worn out to fight back, he will sometimes go into long rants about how he misses his beautiful feathers, and he will say how he wishes he had died instead of being made into a zombie.