Blood Boil

You take 5 points of damage that can’t be mitigated. By doing so, you trace a red magical seal in the air that powerfully directs your magic against a target you can see within range of the spell, making its blood boil within its body and causing severe damage. That target must make a Constitution saving throw. On a failure, it takes 8d10 disruptive damage, or only half that on a success.

This spell deals only half damage to constructs and doesn’t affect undead.

At Higher Levels. When you cast this spell by spending Mana points equal to a 7th-level spell or higher, the disruptive damage increases by 1d10 for each spell level above 6th.