By bonding with a Mirage Master, a Mirage can transform itself into a weapon and be wielded by said Master. The bond grants the Mirage Master a battle suit and various powers including magic, healing, and superhuman feats of strength and agility. By defeating lesser Mirages, they can collect materials that can be used to strengthen their Carnage, granting new weapons that in turn teach them skills or help to improve them.
Each Carnage has a selection of four skills associated with it, and the Mirage can learn these skills by fighting in battle and earning skill points. Eventually, the ability to reforge a Carnage that has had all of its skills learned is unlocked, allowing said Carnage to be powered up and its skills learned again. Upon being reforged for the first time, Carnages offer a fifth skill to learn in addition to its original four.