Adventurer's Talent: Barbarian

You've learned to fight with primal ferocity. On your turn, you can enter a rampage as a bonus action. While rampaging and not wearing heavy armor, you have resistance to bludgeoning, piercing, and slashing damage. You can't concentrate on spells while rampaging. Your rampage lasts for 1 minute but ends early if you are knocked unconscious. Once you have rampaged, you can't do so again until you finish a long rest.