Blood Siphon

Your own shadow separates into three streaks of darkness and rapidly snake off toward up to three enemies that you can see withing range, enveloping them to siphon life force to heal your own wounds. Each target must make a Constitution saving throw, taking 3d8 necrotic damage on a failed save, or half as much damage on a successful one.

Alternatively, all three streaks of shadow can instead converge toward a single target, dealing 5d8 necrotic damage on a failed save, or half as much damage on a successful one. You then regain hit points equal to half the amount of necrotic damage dealt.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 3rd.