Yes, the untapped power that lies within you. Now, child, it's time you awakened that power and realized your full potential.
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Firestorm (ファイアブレイザー Faia Bureizā?, lit. "Fire Blazer") is a Command Style that can be used by Terra, Ventus, and Aqua in Kingdom Hearts Birth by Sleep. It is activated by using Fire-based Deck Commands.

Mechanics

While using Firestorm, Terra, Ventus, and Aqua's attacks become faster and deal fire damage. The standard combo while attacking is a four-hit combo and the combo finisher is a burst of fire surging from the user's body. The finisher consists of the user jumping in the air, charging energy, and hurling a fireball that erupts into multiple pillars of flame.

Appearance

When using Firestorm, the user gains a bright red aura around them. Sparks of fire emit from user body as well.

Obtaining Firestorm