User blog comment:B214/High School DxD EX/@comment-50.139.232.230-20151108154541/@comment-50.139.232.230-20151108155028

The Forbidden Hand is basically an uncontrollable, full power Balance-Breaker, going wild depending on the power released from the Sacred Gear. The easiest examples are True Longinus' Truth Idea, the Juggernaut Drive, Issei's initial Diabolos Dragon, and the other Longinuses' Breakout the Beast.

On the other side, the Demon Hand state is very much the opposite, as the possessors are able to fully control their full-burst Balance-Breaker with their own talent and strength. For instance, Issei's Cardinal Crimson Queen, Vali's Empireo Juggernaut Overdrive, and Cao Cao's True Longinus Chakra Vartin.