Crazy Eights is a weapon for Ace. It provides 62 Attack. It can be bought from the Armory after completing "Mission Under Ceasefire" on Finis difficulty or exchange for 10 tickets on the Square Enix Members site (PSP version). It costs 60000 gil and sells for 6000 gil.
Crazy Eights is a shedding-type card game for two to seven players. The object of the game is to be the first to get rid of all the player's cards to a discard pile.