Blood Boil

You slowly heat the blood of a creature within range. The target must make a Constitution saving throw. On a failed save, the target takes 2d8 fire damage. On each subsequent turns, the target takes 1d6 necrotic damage. The target can repeat the saving throw at the end of each of it's turns to end the effect. When the effect ends, the target takes a point of [conditions]exhaustion[/conditions].

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