Coagulate

You touch a creature, coagulating their blood and granting them resistance to piercing and slashing damage, while making them vulnerable to bludgeoning damage. Attempthing to cast this on an unwiling creature subjects them to a Constitution saving throw, nullifying the spell on a success. If the spell expires or you choose to end it, you may choose to heal the creature equal to 1d4 + your spellcasting modifier if you are within 20 feet of them.