Capacity Cores, often abbreviated C. Cores, are systematic items in Tales of the Abyss that allow characters to learn new AD Skills. Different Capacity Cores level different stats, which in turn allow a character to obtain a wider variety of AD Skills. Functionality is basic. Upon leveling, a character will gain the amount the Capacity Core promises to their stats. Only one Capacity Core can be equipped to a character at a time, and each Capacity Core may be equipped to only one person.