Dual Wielding Berserker

You have studied the art of dual wielding to push your body beyond its normal means. For 1 minute, you can enter into a berserk state in battle and use two-weapon fighting even when the one handed melee weapons you are wielding have the heavy property. After the minute is over, you can continue to dual-wield heavy weapons, but each action you take gives you a point of exhaustion. You can't use this feat again until you finish a long rest.