Crown Demon

Crown Demon is a type of Dead Tree Demon.

Appearance
A demon with a fiendish physiology. It stood two meters tall and resembled a withered tree. Up to three heads extracted from the corpses of slain magic casters hang from a withered branch-like neck. It had clawed hands, and a slender body possessed of unimaginable strength.

Abilities
The Crown Demon belongs to a class of "multi-headed demons", which can equip themselves with the heads of magic casters and use a portion of the powers of the heads’ owners. These demons could use three heads at once.

Trivia

 * Incidentally, Crown Demons can cast 10th tier spells at most.