Beside the name of each support ability is a round slot; a Magic Stone in a slot indicates it is currently equipped to the character. If all the stones have been equipped the unequipped support abilities become grayed out and cannot be selected until enough Magic Stones have been unequipped. The main menu keeps track of the remaining and maximum number of Magic Stones for each character. The formula for gaining Magic Stones per level up is: Although guest characters like Beatrix have Magic Stone counts, player cannot assign them support abilities.