Acidic Infectioon

As you prepare the spell, you take the blood and drop it into the vile of venom, turning it into a flask of sorts. When the flask is thrown and the liquid makes contact with a solid, living victim, the victim takes 5d6 acid damage, and afterward takes 2d4 acid damage whenever the victim takes an action and is poisoned. To cure the Infection, the victim has to take an action and roll medicine. If the medicine check does not exceed 17, the victim takes 2d6 acid damage; If the medicine check is successful, the victim recovers from poisoning and gains 4 HP.