Dark Drain

One illusionary snake strikes out from your arm at a creature within range. Make a spell ranged attack against the target. On a hit the target takes 1d12 necrotic damage and you gain temporary HP equal to half the damage dealt rounded down, minimum of 1.

When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d10 for each slot level above 1st.