Balhiir

Balhiir are energy creatures that feed off of magic, any form of magic, from thrown spells to magic items up to dragon magic. While they cannot be harmed with mundane objects, they can be drained or 'prisoned with telekinesis. A balhiir can only be destroyed by its releaser. Balhiir inhabit their own plane and can be summoned to the Prime Material Plane. They can be bound into objects or made to 'ride' other beings. They resemble a loosely grouped cloud of lights.