Dark Siphon

Using your body as a tether between two lifeforces. The living target must make a Con save, On a Save No damage is done to the target , but 1d6 is dealt to the caster and heals an ally. On a failure, you deal 1d6 necrotic damage to one target and yourself. Your ally will regain this total as Hit Points.

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