Dark Pact

You undergo a dark ritual, calling upon shadowy and chaotic beings to influence your magic. You take 1d8 Necrotic damage for this rite of boon, in order for one spell that is 3rd spell slot or lower of your choosing to either gain one additional hit die on a successful spell attack or gain +3 to your spell DC if it does not directly harm the target(s). This boon lasts for the day you casted this ritual, and you can not recast this ritual successfully more than once. If you do so, these beings will curse you however the DM chooses.