You utter a word of power that drains the life energy from one creature you can see within range. The target must make a Constitution saving throw. On a failed save, the target takes 20d10 necrotic damage, and you regain hit points equal to half the amount of necrotic damage dealt. On a successful save, the target takes half damage, and you regain hit points equal to a quarter of the amount of necrotic damage dealt.

This spell has no effect on undead or constructs.