Chaos Orbs are orbs that contain a boss's sealed powers. They are used to create runes and certain pets. All bosses, with the exceptions of Treant, Wendy, Octus, and Lenasian, drop a chaos orb randomly upon defeat. Chaos Orbs can be obtained on any difficulty, although they drop more frequently on 3 Stars and Champion Mode. As of Chaos, Chaos Orbs no longer drop from bosses. Note: These orbs no longer drop, since runes have been replaced with the reinforcement system.