Blood Boiling

Boil the blood in the veins of a creature you can see in range. The target takes 1d6 necrotic damage. For the duration, at the beginning of each of its turns the target must make a Constitution saving throw. On a failed save, the target takes 1d4 necrotic damage and is paralyzed until the start of its next turn. On a successful save, the effect ends on the target.

This spell has no effect on creatures without blood or blood flow such as constructs, oozes, or undead.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage that occurs after a failed save increases by 1d4 for each slot level above 1st.