Command Style

The Command Style is a new battle system that appears in Kingdom Hearts Birth by Sleep. When Terra, Ventus, and Aqua fill up the Command Gauge with the correct types of attacks, they can undergo a Style Change which grants increased strength and new combos. There are some shared Command Styles that all three characters can utilize, and some exclusive Styles that only one can perform. The enhanced Magic and physical attacks made available by Command Styles create more effective methods and strategies of combat.

Mechanics
Upon meeting certain requirements while filling up the Command Gauge (located right above the Deck Command menu), a character may undergo a Style Change rather than executing a finishing attack. Every style change has certain requirements for activating; an example of executing Diamond Dust would be to fill up part of the Command Gauge with an Ice based attack.

While using a Level 1 Command Style, the player can further achieve a second level by filling up any specific Style Gauge. An example of how this would work is if Ventus filled Firestorm's Style Gauge with an Aero spell, the result will be the powerful Cyclone Command Style.