Devastator

Many people take up the blade to defend their homes, fighting fire with fire. Some do it for the coin. Others for fame and glory. But a rare few believe a weapon has only one purpose: concentrated violence.

Demon Strike

Beginning at 3rd level, you gain the ability to strengthen your blows against a foe at the cost of weakening yourself to theirs. Once per turn, you may declare an attack of yours to be a demon strike. If this attack hits an enemy, your target becomes vulnerable to the attack’s damage. If it had resistance to the damage, it instead loses resistance to the damage. In addition, you gain vulnerability to the target’s next weapon attack that hits you. This vulnerability ends after you take the damage or at the start of your next turn, whichever comes first.

Tolerance

At 7th level, whenever you hit an enemy with Demon Strike, you gain temporary hit points equal to your Constitution modifier until the start of your next turn.

Relentless

Beginning at 10th level, landing a decisive blow helps knit the injuries you’ve sustained. Whenever you reduce a hostile creature to 0 hit points, you may immediately expend a Hit Die and regain hit points as if you had completed a short rest

Vengeance

Starting at 15th level, you gain the ability to rebuke your enemies when they harm you. Whenever a creature strikes you with a weapon attack, you may use your reaction to deal damage to your attacker equal to half the damage it dealt to you. If the attack would knock you unconscious, your attacker instead takes damage equal to the total damage it deals to you. You may use this feature a number of times equal to your Constitution modifier (minimum 1). You regain all expended uses at the end of a long rest.

Improved Demon Strike

When you reach 18th level, your Demon Strike becomes more potent. When you use this feature, you add your proficiency modifier to the damage if the attack hits.