Deal physical damage to the target.Final Fantasy IX description
Thievery is the eighth and last of Zidane's Skills. It costs 8 MP to use and takes 100 AP to learn. Once Zidane has learned Thievery, he can use his strongest Dyne attack, Grand Lethal. Thievery is learned from two weapons: The Tower (found in the final dungeon) and Angel Bless (synthesis).
Its damage is calculated as follows:
Successful steals by Zidane, Blank, Marcus and Cinna throughout the game count towards the total, including steals before Thievery is learned. They count even if the inventory slot for the stolen item is full.
For example, if the player has successfully stolen 100 items, and Zidane's Speed stat is 30, Thievery will do fixed 1,500 damage to the target, ignoring both the target's Defense and the Protect status. Thievery is potentially one of the strongest attacks in the game, tied with Freya's Dragon's Crest, Beatrix and Steiner's Shock, and Quina's Frog Drop.
Thievery is the ability that is used by Zidane during battle.