Item Arts is a technique of using certain ingredients together to aid in combat. Item Arts cost no AP to use, instead requiring ingredients which must first be bought or found. All Item Arts have "Tiers" which consist of I, II, III, IV, and lastly V. Tiers increases the effectiveness of the Item Art and reduces the amount of ingredients needed to perform it. When a new Item Art is learned, it starts at the lowest Tier, which is I. Through constant use, it can attain higher Tiers, and even unlock completely new Item Arts. To find out more about how this works, see Developing Arts.