Vitality Grasp

You wreath your hand in shadows, creating a beam that siphons life force from others to provide healing. The creature must make a constitution saving throw, on a success the damage is halved. You deal 1d4 necrotic damage and you gain a pool of hit points that lasts 24 hours equal to the damage dealt, being able to administer it as you see fit amongst allies within 30ft as a bonus action. Until the spell ends, you can make the attack again on each of your turns as an action.

At Higher Levels: When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d4 for each slot level above 1st.