Combination Boost

You may be looking for Combo Boost.

Combination Boost (コンビブースト, Konbi Būsuto) is an ability that appears in Kingdom Hearts II. It extends the time duration of the user's Limits.

Mechanics

In Kingdom Hearts II, Combination Boost is a support ability that costs 4 AP to equip.

Learning Combination Boost

Kingdom Hearts II

• Sora learns Combination Boost at level 31 with the Dream Sword, 39 with the Dream Shield, and 59 with the Dream Rod.