Blood Clot

Your touch causes blood to thicken and congeal. Make a melee spell attack against the target. On a hit the target takes 3d8 necrotic and they must make Constitution saving throw. On a failed save the target gains one level of exhaustion and are stunned for their next round, as horrible pain racks their body. Creatures without blood or similar are completely immune to all effects of this spell.

At Higher Levels. For every two levels of spell slot above third you use on this spells, it deals an additional 1d8 necrotic and creatures gain an additional level of exhaustion on failed saves.