Blood Burn

You point toward a creature within range, causing its bodily water to boil to steam. The creature must make a Constitution saving throw. On a failed save, that creature's blood starts to run as dry as dirt inside their very veins - the creature takes one level of exhaustion. On a successful save, that creature's will is strong enough to resist this effect.

As you gain levels, you can more easily tamper with life force energy. When you reach 11th level, you may target up to two creatures with this spell. At 17th level, you may target up to three creatures, or choose to target only one and give that creature disadvantage on its saving throw against this spell.