Blood Boil

You point towards a target creature you can see. The creature must make a Constitution saving throw, taking 4d8 Necrotic damage on a failed save or half as much on a successful save. At the start of each of the creature's turns, it must make another Constitution saving throw or repeat the effect. The spell ends if the target is ever outside the spell's range or if it has total cover from you. This spell has no effect on undead or constructs.

At Higher Levels: When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d8 for each slot above the 5th.