Reaction Boost

Reaction Boost (リアクションアップ, Riakushon Appu, lit. "Reaction Up") is an ability that appears in Kingdom Hearts II. It increases the power of Reaction Commands by 50%.

Mechanics

In Kingdom Hearts II, Reaction Boost is a support ability that costs 2 AP to equip.

Learning Reaction Boost

Kingdom Hearts II

• Sora learns Reaction Boost at level 15 with the Dream Sword, 23 with the Dream Shield, and 33 with the Dream Rod.
• The Guardian Soul has Reaction Boost as its equipment ability.

Kingdom Hearts II Final Mix

• Roxas learns Reaction Boost at the beginning of the Third Day in Critical Mode.
• Sora learns Reaction Boost at level 15 with the Dream Sword, 23 with the Dream Shield, and 33 with the Dream Rod.
• The Guardian Soul has Reaction Boost as its equipment ability.