Achaierai

"A large creature stands on four stiltlike legs. It has a birdlike body, round and plump, about the size of a small pony, balanced atop its legs. Feathers that range in color from brown to red cover its body, and its terrible claws and beak glint like burnished metal."

- Skip Williams, Monster Manual 3.5

Achaierais were large, flightless, birdlike creatures that could be found in the Barrens of Doom and Despair and in Acheron.

Description
These creatures resembled 15 ft (4.6 m) tall flightless birds with colorful feathers and four long legs that ended in wicked claws.

Abilities
An achaierai may release a toxic black cloud when threatened. This cloud had an adverse effect on any caught within it, damaging them and possibly driving the victims to madness. Achaierai were very resistant to magic.

Psychology
These outsiders were known for their evil personalities, their predatory instincts, and their love of torture.