Boiling Blood

For the spell's duration, a target within range must make a CON save or take 2d6 fire damage (half as much on a successful save) and an additional 2d6 fire damage for every attack that hits them before the spell ends. On a success, the target still takes the initial 2d6 fire damage but they don't take the additional damage when an attack hits.

At Higher Levels. For each spell slot above 2nd that this is cast, the initial damage increases by 1d6.