Skeletal gryphon

Skeletal gryphons are undead gryphons. Gryphons can also become spectral gryphons in undeath.

Known types

 * Black Knight's Skeletal Gryphon
 * Bone Gryphon
 * Scourge Gryphon
 * Shadow Vault Gryphon
 * Skeletal Assault Gryphon
 * Skeletal Gryphon (Karazhan)
 * Winged Steed of the Ebon Blade

Speculation
Due to the only pre-WotLK example of this creature type existing by the unused Karazhan flight point (and Netherspace to some extent) with a very generic name, it could possibly be thought that their role was going to be the mounts that that flight path used.