Sanguine Spike

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.