Boiling Blood

Choose a target within range that you can see. That target writhes in pain as their blood boils for the duration of the spell. The target must make a con save. On a failed save, the target takes 1d6 necrotic damage, and on each of your turns for the duration, you can use your bonus action to deal 1d6 necrotic damage to the target automatically. The spell also ends if the target is ever outside the spell’s range or if it has total cover from you.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the initial damage increases by 1d6 for each slot level above 1st