Thunderstorm

Thunderstorm (サンダーストーム) is a technique usable by Terra, Ventus, and Aqua in Kingdom Hearts Birth by Sleep. The attack consists of launching a small salvos of electrical blasts at targets.

Mechanics
In Kingdom Hearts Birth by Sleep, Thunderstorm is a Shotlock. Once the attack has begun, the player can perform extra attacks by pressing to fire additional blasts (based on your timing rating).

Kingdom Hearts Birth by Sleep

 * Terra can obtain Thunderstorm from a chest at The Chateau at the Castle of Dreams.
 * Ventus can obtain Thunderstorm from a chest at the Castle of Dreams' Mousehole.
 * Aqua can obtain Thunderstorm from a chest at the Castle of Dreams's ' Foyer.