thaumavore

Etymology
From.

Noun

 * 1)  An animal or lifeform that feeds off of magic or magical energy as the main part of its diet.
 * 2) * 2014, Bloodforge, Dreamscarred Press, page 94:
 * Major Transformation: Thaumavore (Su): Alterations to the mongrel’s blood and magical aura causes her to leech energy from spells cast upon her; the mongrel gains 5 temporary hit points whenever a spell is cast upon her and heals 1 point of ability damage.
 * 1) * 2021 (2022), Jed MacKay, Death of Doctor Strange, ISBN 1302930222:
 * "IT IS THE APEX PREDATOR OF THE MAGICAL FOOD CHAIN. A THAUMAVORE WITH AN APPETITE THAT CANNOT EVER BE SATED.