Wyrm are draconic cave-dwellers with long and muscular tails. The tip of the tail can optionally have a tuft of tail-hair similar to Elwyn.

They live amongst dragons in the Hallowed Mountains and Waking Caverns, guarding the crystalline caves. As the Hallowed Mountains border the home of the Alcyone, the two bloodlines have started to intermingle in recent years, resulting in Seraph-winged Wyrm with spiky dragon-like wings, but the Seraph mutation is not yet common enough in the Wyrm bloodline to be considered the norm (and thus not included for free in custom genos)

Wyrm can only have scales and dragon-like spines if they have the Serpent mutation. If the Serpent mutation is not present then the Wyrm tail will simply be covered in a hair coat like the rest of the horse's body.

For coat colors where the mane and tail are differently colored than the basecoat, you can decide how much of the Wyrm tail counts as "tail" and how much counts as "body", meaning on for example a bay, the Wyrm could have a fully brown tail, fully black, or partially brown with a black tip. If a hair-tuft is present at the tip of the tail then it is reasonable to treat the entire tail as body-coat and the hair-tuft as the "tail hair".