Bloodburn

Select one creature within range that has been wounded in the last minute and has not yet received any healing. If the creature fails a Constitution Saving Throw, the blood from their wounds bursts into fire, inflicting 5d8 fire damage to the creature at the start of each of its turns and preventing it from receiving any healing while the spell is in affect. The creature can repeat the saving throw at the end of each of its turns; the spell ends when it has made two successful saving throws, which need not be consecutive.