Prerequisite: Strength 13+ Level 4+
You can push yourself beyond your limits. By expending your available hit dice you gain the following benefits.
Limit Breaker. When you fail an ability check using Strength, Dexterity or Constitution, you can use your reaction to expend one of your available hit dice and add it to the total, potentially turning it into a success.
Overpower. Immediately after you hit with an attack using a melee weapon or unarmed strike on your turn, you can use a bonus action to roll a number of your available hit dice up to your Strength modifier and add them to the weapon’s damage.