Mithral Nail Polish.

This bottle has 5 charges, and then is empty and can not be reused A silvery substance that dries down onto nails, temporarily empowering unarmed strikes. Your Unarmed Strikes now Deal an additional 1d6 slashing Damage.

Once Applied, this polish lasts a 1d4+4 days before fading, and can be removed with a DC 17 Arcana check whilst scrubbing your hands.

Rarity

Very Rare Wondrous Item