Blood Ray

You unleash a crimson ray of necromantic energy at a creature you can see within range, commanding its blood to boil and burst within its veins. If the target has 100 hit points or fewer, it dies instantly as its body is wracked by catastrophic internal hemorrhaging. If the target has more than 100 hit points, it takes 10d10 necrotic damage instead, and it can’t regain hit points until the start of your next turn as its life force rebels against healing magic.

A creature killed by this spell has its blood violently expelled from its body, leaving it desiccated and lifeless. This spell has no effect on creatures that lack blood or a circulatory system, such as constructs, oozes, or undead.