Draining Vines

The caster shoots thorny vines out of their hands at a creature that dig into them and drain them of their life force. Make a ranged spell attack against the target. On a hit, the target takes 3d6 necrotic damage immediately and  steals 3d4 HP at the end of its next turn.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage (both initial and later) increases by 1d6/1d4 for each slot level above 2nd.