Fists of Fury

Weapon, legendary (requires attunement)

These dark iron knuckledusters come in a pair, and are slightly warm to the touch. You can wield one in either hand, transforming your unarmed strikes with your fists into magical weapon attacks. You gain a +2 bonus to attack and damage rolls made with your unarmed strikes in this way. Treat each hit with them as if it were made with a mace, except it deals 2d6 bludgeoning damage instead of the normal damage for your unarmed strikes. You can use your Strength or Dexterity modifier for your attack and damage rolls with your unarmed strikes using these knuckledusters, and immediately after you make an unarmed strike with them as part of the Attack action, you can make another unarmed strike with them as a bonus action.

Bloody Knuckles. As a bonus action, you can tap the knuckledusters together while wielding them in either hand to activate this property. When you do, you are flooded with a wellspring of powerful anger and immediately gain a number of temporary hit points, which last for 1 minute. While you have these temporary hit points, you gain the following benefits:

• You can use your reaction when you take damage from a melee attack to reduce that damage by half. If the attacker is within 5 feet of you, you can immediately make a single unarmed strike against it using the knuckledusters.

• You can choose to lose 10 temporary hit points to increase the damage dealt by your unarmed strikes by 1d6 until the end of your turn (no action required).

• You can choose to lose 10 temporary hit points to add 10 to any Strength (Athletics) check you make or Strength save DC to grapple another creature (no action required).

The temporary hit points you gain in this way comes from a pool of them. The pool has 100 temporary hit points, and it regains 3d20 + 40 temporary hit points daily at dawn. When you activate this property, the number of temporary hit points you gain from it is equal to the remaining number you have in the pool. When the effect ends, any of these temporary hit points you have remaining are returned to the pool.

The effect ends early if you are no longer wielding the knuckledusters in either hand, if you don't take the Attack action on your turn, or if you lose all of these temporary hit points before the end of the duration.

Flaw. You gain the following flaw: "I have difficulty controlling my temper."

A delightful series of snaps.
First my temper, and then your bones.