As in Kingdom Hearts, these allies generally cannot be used on all worlds. Each friend summon can be upgraded to more powerful levels by stocking multiples of that friend card, though they can also be used in various combinations with other Friend Cards, as well as Attack, Magic, Summon, and Item Cards to perform different spells and summons unavailable in the other games. Many of these new combinations are Kingdom Hearts versions of traditional Final Fantasy spells like "Terror" or "Teleport".