Blood Siphon

You tear a thin stream of blood and vitality from a creature you can see within range, drawing part of its life force into yourself.

The target must make a Constitution saving throw. On a failed save, it takes 3d6 necrotic damage, and you regain hit points equal to half the necrotic damage dealt.

On a successful save, the target takes half damage, and you regain no hit points.

This spell has no healing effect if the target has no blood, such as most constructs, elementals, oozes, or skeletal undead, though the creature may still take the damage if the DM allows it.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d6 for each slot level above 1st.