Chill Gauntlets

You create a ghostly, skeletal hands which attach to your physical hands. Make a melee spell attack against the creature to assail it with the chill of the grave. On a hit, the target takes 1d10 necrotic damage, and it can't regain hit points until the spell has ended. Until then, the gauntlets remain attached to your hands.

If you hit an undead target, it also has disadvantage on attack rolls against you until the spell has ended.

This spell's damage increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10).