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 small salvos of electrical bursts at targets.

Mechanics
In Kingdom Hearts Birth by Sleep, Thunderstorm is a Shotlock. After the initial volley, the player can perform extra attacks by pressing at a specific time to fire additional blasts. The more accurate your button press, the more bursts you will fire.

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.