Glass Arm

Wondrous item, legendary (requires attunement)

This red glass is sculpted to look like a human left arm and hand. Attuning to it requires you to be missing most or all of your left arm. When you attune to it, it attaches itself to whatever remains of your left arm. Removing it from you without your permission requires an opposed Strength check (you have advantage on this check).

The arm has five charges, and it regains 1d4 charges daily at dawn. Wearing the arm gives you the following abilities.

Deflect Missile. When you are hit by a ranged weapon attack, you can use your reaction to expend one charge and deflect or catch the missile. When you do so, the damage you take from the attack is reduced by 1d10 + your Dexterity modifier + 10. If you reduce the damage to 0, you can catch the missile if it is small enough for you to hold in one hand and the arm’s hand is free.

Enhanced Physique. Your Strength and Dexterity scores are 17 while you wear the arm. If your ability score is already 17 or higher without the arm, it doesn’t improve that ability score.

Grapple. You gain the Grappler feat.

Stunning Strike. When you hit with the arm, you can expend a charge to attempt a stunning strike. The target must succeed on a Constitution saving throw (DC 17) or be stunned until the end of your next turn.

Unarmed Strike. You can use the arm to make an unarmed strike, inflicting 1d6 bludgeoning damage.