Name: Keyblade Column
What happens when you do your limit break: Thousands of keyblades form a column that surrounds the opponent. Then it implodes and aims for the opponent.
Sequence of Break: Jack forms an X with his swords and a pulse shoots out of it that goes straight forward. It then wraps around the object it hits. It wraps around repeadetly until it forms a gray column. It soon turns into a column of keyblades after materalizing. The opponent cannot move or he/ she will get hit with a keyblade.
Balance of power: It takes out 1/2 of Jack's remaining MP and he cannot use it again for the remainder of battle.