Source: Bigby Presents - Glory of the Giants

Wondrous Item, Rare (Requires Attunement)

The back of this weatherworn leather glove is adorned with three large metal hooks shaped like a mole’s claws. Stitched into the glove’s palm is the mountain rune.

The glove is considered a simple melee weapon with the finesse and light properties, and it deals 1d4 slashing damage on a hit. While attuned to the glove, you gain a burrowing speed equal to your walking speed and blindsight to 15 feet.

Invoking the Rune. As an action, you can invoke the glove’s rune to bolster yourself with the sturdiness of the earth. Spend and roll a number of your unspent Hit Dice up to a maximum equal to your proficiency bonus. You then regain a number of hit points equal to the total roll plus your Constitution modifier.

Once the rune has been invoked, it can’t be invoked again until the next dawn.