Skaveling

One must perform a hideous ritual to make a skaveling. Though sometimes called ghoul bats, they're specifically crafted undead rather than true ghouls. The bloodsucking urdefhans of the Darklands raise giant bats on a toxic fungus and the flesh of ghouls—specifically their brains. Upon reaching maturity, these giant bats are ritually slain via poison. While this rots away the flesh of most creatures, the specially prepared bats immediately rise from death as skavelings.

Despite their tattered wings and sagging skin, skavelings are quite capable of flight, even when carrying a creature on their back. Urdefhans often use them as mounts. Their intelligence is more advanced than that of a typical giant bat, and in combat they behave more like allies than animals, capable of making tactical decisions.