Eldritch Circle of Draining

The caster drains life from a foe within a 20 foot radius around the user. The foe(s) must succeed a constitution saving throw or is drained of 1d6 hit points of necrotic damage, half as much on save. 

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, each target takes 1d6 extra damage of the type rolled for each slot level above 1st.

At 3rd level. The caster learns to channel the drained damage to heal himself/herself, the caster receives half of the damage total in hit points as healing.