Changes

'''Battle Mastery''' is a new Combat Keyword that was added in the third ''[[Bakugan Battle Planet]]'' card set, [[Age of Aurelus]]. As of now, it is only known to exist on [[Aurelus]] cards, specifically [[Action Card|Action Cards]]. It simply is a fancy way of saying ''choose one''.

Battle Mastery cards have two effects, and the user must select one effect to use. This is also clarified after every instance of "Battle Mastery" by adding "Choose one" in every card effect.