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Gravity Break (グラビティブレイク, Gurabiti Bureiku?) is an ability that is exclusive to Kingdom Hearts Final Mix. It allows Sora's Keyblade to cast a miniature gravity spell by bringing back his Keyblade to slam a miniature gravity sphere in front of him with it.
In Kingdom Hearts Final Mix, Gravity Break is a combat ability unique to Sora which provides a 30% chance of unleashing a gravity-based finishing combo attack on ground targets. It costs 2 AP to equip. It deals damage equivalent to (40 + Strength)% of the enemy's HP. After hitting the target, Sora takes 16 frames to recover (0.5 seconds).
Learning Gravity Break
Kingdom Hearts Final Mix