Demonic Grasp

Your attacker strikes out at you but misses. Using your reaction, your arm and hand turn into a blackened mass of dark matter and claws, grasping the attacker around the neck. On a successful hit, the target takes 2d6 piercing damage. The claws pierce the skin and the demonic power surges within them. The target must make a Constitution saving throw. On a failed save, the target takes 3d8 necrotic damage.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the necrotic damage increases by 1d8 per level.