Bloodfire Rush

You boil the blood of a creature you can see within range. That target must make a constitution saving throw. On a failed save the target takes 4d6 fire damage and 4d6 necrotic damage, or half as much on a successful one. You regain hit points equal to half the amount of necrotic damage dealt, additionally, the creature is immune if it has no blood.

AT Higher Levels. When you cast this spell using a spell slot of the 4th level or higher the fire damage increases by 1d6 for each slot level above the 3rd.