All pieces of equipment can have a maximum of one to four auto-abilities. Most equipment have auto-abilities already assigned to them when acquired, but once the player reaches Guadosalam, they can customize auto-abilities onto equipment as long as they have the required number of items, and as long as the equipment has at least one empty slot. Once an ability is added to a piece of equipment, it cannot be removed. Brotherhood, Celestial Weapons, and non-empty-slotted equipment cannot be customized. Below is the list of auto-abilities that can be customized to weapons and armor.