Blood Boil

You channel your maqical power into your hand and make a melee spell attack against a creature you can reach. On a hit, the target takes necrotic damage equal to your spellcasting ability modifier. The target must also make a Constitution saving throw or take Id4 fire damage at the start of each of its turns for I minute. The creature can choose to forgo its action on its turn to quench the fire damage and end the effect of boiling blood.

(original from u/dragonsandstories on reddit)