Combo Boost

Combo Boost is an ability that increases the damage caused by the user's weapon as long as a combo is initiated and/or prolonged by the user.

Kingdom Hearts II
Increases the damage of the finishing move on the ground relative to the number of hits in the combo.

Kingdom Hearts Re:Chain of Memories
''Boosts power with every strike with an attack card. Returns to normal when a card is broken. Resistant to fire, ice, lightning, and special attacks.''

Kingdom Hearts 358/2 Days
Dish out increasingly higher damage as your combo continues.

Kingdom Hearts II

 * Learned by Sora (LV 7 /9 /17 )
 * Decisive Pumpkin

Kingdom Hearts Re:Chain of Memories

 * Saïx Enemy Card

Rings

 * Soldier Ring