Bone claws

Choose a creature within range, their nails grow into elongated claws, their unarmed attacks now deal an extra 1d4 slashing damage

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases to 1d6 at 2nd level; 2d4 at 3rd level; 2d6 at 4th level; and 3d4 and 5th level.