Bone Claws

Choose a creature within range. You infuse them with osteomantic energy, growing sharp claws from their carpal bones. For the duration, the target’s unarmed attacks deal an additional 1d4 slashing damage on a hit.
At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the number of dice increases by one for each level of the slot above the 1st (2d4 at 2nd level, 3d4 at 3rd level, ...)