Demons

Winged, malicious creatures of the Fire Realm, thralls of the Fire Lord Bahal. Demons are created out of living creatures by Bahal's magic; the process blanches their skin, turns their eyes red, and bestows wings. The victim otherwise retains some of their former appearance (and gender). The great majority of observed demons are humans.

In Book 2, Xan's inadvertent summoning of Bahal calls a legion of demons into the world with him, and they quickly destroy the village of Canopy.