Berserk Charge is a KH2 Abilty for the Fatal Crest. Berserk Charge can also be attained by leveling up. Berserk Charge is an ability that means when one is in MP charge, an infinite combo is made, until MP charge is over. If you're planning on killing a boss with it (such as Sephiroth), then DON'T USE THIS ABILITY. Most bosses have the "once more" ability equipped, which prevents them from being defeated by a combo.