Bloody Smite(Kobold Press)

The next time you hit a creature with a melee weapon attack during the spell's duration, your weapon pulses with a dull, red light and the attack deals an extra 1d6 necrotic damage to the target. At the start of each of its turns until the spell ends, the target must make a Constitution saving throw. On a failed save, it takes 1d6 necrotic damage, it bleeds profusely from the mouth, and it can't speak intelligibly or cast spells with a verbal component. On a successful save, the spell ends. lf the target or an ally within 5 feet of it uses an action to tend the wound with a successful Wisdom (Medicine) check against your spell save DC or the target receives magical healing, the spell ends.

Modified From Kobold Press: Deep Magic 5E