Evokers

From BoardGameGeek:

Evokers is a 2 player card in which Evokers duel through contracting and commanding demons. Simply defeat your opponent's demons before they yours and victory shall be yours. Every single one of the 120 demons are unique individuals, each with their own charm and wit. And when an individual demon is not enough for you, fuse two together to create an entirely new and unique demon, limited only by your imagination. -description from the publisher