Burning Blood

A creature within range is cursed with an extremely undesirable curse. They must make a Constitution saving throw or have their blood boil with flame. Three successful saves end the effect. The target is cursed. While cursed in this way, the target takes 2d6 fire damage at the beginning of their turn and has disadvantage on all saving throws and attack rolls as pain wracks their body.

If you can keep concentration of this spell for the whole duration and not have the target save successfully thrice, the effect lasts for 2 hours.