Blood Shard

When you cast this spell, your current hit points are reduced by an amount equal to the spell's level.

You create a shard of your hardened blood and fling it at one creature within range. Make a ranged spell attack against the target. On a hit, the target takes 1d12 piercing damage. Hit or miss, the shard then explodes. The target and each creature within 5 feet of where the shard exploded must succeed on a Dexterity saving throw or take 2d8 necrotic damage.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the necrotic damage of the blood explosion increases by 1d8 for each slot level above 1st.