Vamp

You tap into vitality of nearby creatures to bolster yourself. Every creature other than undead or construct in a 15 ft radius around you must make a Consititution saving throw against your spell save DC and makes so with a disadvantage if it has half or fewer hit points. On a fail, the creatures loses all its temporary hit points and takes 1d6 necrotic damage. You regain hit points equal to half the damage dealt, including removed temporary hit points. A willing creature can fail the save automatically.

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