Kingdom Hearts Birth by Sleep

Birth by Sleep is an action roleplaying game that introduces a gameplay aspect called the Command System, which allows players to customize a Command Deck with techniques and abilities that they can perform at will, called Deck Commands.

Performing ordinary attacks and Commands fills a gauge displayed above the command deck that, when certain requirements are fulfilled, activates a Command Style that changes the player's basic attack command with the "Surge" command, which racks up powerful combos depending on what Command Style is activated.