Blood Shatter

You cause some of a creature's blood to erupt from its body and coalesce into shrapnel. Choose a creature that has blood. It must make a Constitution saving throw. On a failure it takes 3d10 necrotic damage or half as much on a success. If you targeted yourself you automatically succeed on the Constitution saving throw. Creatures within 10 feet of the target must make a Dexterity saving throw. They take 4d4 piercing damage on a failure or half as much on a success. If you targeted yourself the damage increases by 3d4.

At higher levels. If you cast this spell using a spell slot of 3rd level or higher the damage increases by one dice for every spell level above 2nd (an additional 1d10 necrotic damage and 1d4 piercing damage).