Pyre-Cloak

Native to the elemental plane of fire, but frequently accidentally summoned by would-be conjurers. Thoroughly evil, and perpetually hungry, Pyre-Cloaks are large creatures that swim freely through their home's lakes of fire. On the material plane, they live a different life. Feeding on heat and flesh, particularly the flesh of dwarves and magic users, they are an ambush predator that hides in the heat of a fire. On attack, they engulf their prey and burn them alive, absorbing their flesh and life-force.

Legends speak of massive variations that nest in volcanic calderas, occasionally swooping down on flaming wings to engulf entire settlements.