When the Abyssal Dirk was first found, scavengers figured there'd be more underneath the surface of the Northern Ocean; they hated how right they were. While attuned to these deep ebony gauntlets, they crackle with blue magicka and grant the following:

Hands of Horror. You learn the Mage Hand cantrip. It gains the appearance of a spectral tentacle and its range is doubled.

Eldritch Invigoration. Once before needing to finish a long rest, you restore up to three expended hit dice at will.

Wounded Pride. Whilst wearing these gauntlets, your attacks of opportunity lash out at your target with unnatural precision. On a hit, a living target has to succeed on a DC 15 Constitution saving throw or suffer a wound. For each wound the target has, they take 1d4 psychic damage at the start of their turns. As an action, a creature can attempt to succeed on Medicine check with a DC equal to 8 + the amount of wounds they have. On a success, all wounds are healed.