Drain of soul

You suck in vitality from living creature. Make a ranged spell attack. On a hit, deals 1d6 necrotic damage and while the spell lasts, you can spend bonus action to cause the target to take 1d6 necrotic damage on each of your turns. You regain hit points equal to half the necrotic damage dealt. The spell ends if the target becomes immune to necrotic damage, you can no longer see the target, or you lose concentration.

If you miss, you dont lose your spell slot.

If target with the soul dies, you gain it fragment of soul as Soul Shard.

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