Boiling Blood

Choose one creature with blood that you can see within range. The target must make a Constitution saving throw. On a failed save, it takes 2d6 necrotic or psychic damage (your choice) and is restrained for the duration.

At the end of each of the target’s turns, it can repeat the saving throw. On a failed save, the target takes 2d6 + 1d4 damage, and this 1d4 damage increases by 1d4 for each consecutive failed saving throw against this spell. On a successful save, the spell ends and the target is no longer restrained.