Most Barbarian skills require [[Fury]] to cast. Fury is a mana-like bulb that fills up when the Barbarian hits enemies, then drains quickly away when he stops hitting. This means that a Barbarian is unable to use his more powerful abilities at the start of a fight, and must charge up his Fury before he can begin to unleash his more devastating attacks.

** [[Battlemaster Skill Tree]]

** [[Berserker Skill Tree]]