Ultranium/Mind of the Mindflayer

Mind of the Mindflayer is an accessory that is obtained from defeating the in Expert Mode. When equipped, you will gain 10% increased damage and critical strike chance, a chance to dodge enemy attacks, and longer invincibility when hit. It also summons an eldritch aura around the player that damages nearby enemies. Disabling the visibility of the accessory will disable the aura but strengthen the damage and critical strike chance from 10 to 15%.