Enlarge Wounds

If an enemy creature within a 5 foot radius of you is hit with a melee weapon attack by one of your allies, you can use your reaction to touch the wound to magically enlarge the wound of your enemy.
The target must make a Constitution saving throw. On a failed save, the target takes 2d8 necrotic damage, half of it if it succeeds, and it has disadvantage on constitution saving throws it makes before the end of its next turn.

At Higher Levels: When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d8 for each slot above 2nd.