Chichimec

Chichimecs were abominations spawned by deities of air, wind, and the skies.

Description
A chichimec looked like a clump of madly flapping wings; some chichimecs had feathered wings and others had batlike ones. A single long tail trailed from its center of mass. Their coloration ranged from pale white to beige, with a sickly blue in some areas. It had tiny eyes and mouths on its body trunk, but unless slain and dissected, those would never be seen.

Abilities
Chichimecs had a number of air, weather, and thunder-related spell-like abilities, but most salient was that they could fly with perfect maneuverability at incredible speed.

Combat
If forewarned, chichimecs summoned air elementals in advance, and preferred to start combat by casting wail of the banshee, which they could do once per day, if they had no likelihood of slaying their own summoned elementals with it. Most of their spell-like abilities were useful in combat. They were immune to electricity, and their bodies closed wounds so swiftly they could come back from the brink of death to full health in less than ten minutes. If their tail struck a living being, they could drain the target's personality to heal themselves. Like all other abominations, it was impossible to transform their bodies, affect their minds, or drain the vitality from them. They were highly resistant to both cold and fire, and were continuously protected by an effect akin to nondetection.

History
In, a number of chichimecs destroyed a Deep Imaskari colony on the Elemental Plane of Air, and then entered Deep Imaskar itself. They caused great damage before being driven out.