Shotlock

Shotlock (シュートロック) is a combat system for Terra, Aqua, and Ventus that debuted in Kingdom Hearts Birth by Sleep. It is initiated by holding and  together. The user enters a targeting mode and locks onto enemies, and by pressing, the user then initiates a powerful attack that hits all targeted enemies. By locking onto the maximum amount of enemies, additional attacks can be added by following on-screen prompts. The amount of time the user has to lock onto targets depends on the Focus Gauge, which empties when the attack is initiated and can be refilled by attacking enemies and using Ethers. Most of the Shotlocks in the game can be learned by all three Keyblade wielders, but they also get several that are unique to themselves.

Each Shotlock can be enhanced by performing a certain action to add extra attacks. There are four methods of adding extra attacks, which determine the Shotlock's class.
 * Class A Shotlocks involve pressing the button rapidly.
 * Class B Shotlocks involve pressing random buttons when prompted.
 * Class C Shotlocks involve performing well-timed button presses.
 * Class D Shotlocks involve rotating the analog pad.