Sylvester's Make Deal

You make a verbal offer to a sentient creature. The creature must be able to speak at least one language or the spell fails. The creature must be acting of their own free will and must be completely free from the control of all enchantment spells except for this one, or else the spell is not cast. The creature will understand the words of the deal regardless of what language you speak it in. The deal must have a requirement that must be met for both the caster and the target. Things that might be offered/taken as part of the deal include but are not limited to: souls, years of life, earthly possessions, memories, free will, consciousness, player levels, features, Maximum health, ability scores, ideas, Titles, identity, spells, spell slots, class features, and emotions. When such things are used as part of the deal will be instantly transferred once the deal is made. Once the terms of the deal are finalized, a magical purple flame will envelop the hand of the caster. Once the target shakes the caster's hand, the flames will spread over both of their entire bodies, and will then dissipate. A blackened mark will appear on the caster's and the target's forehead and will remain there until the deal is carried out in its entirety. If the caster or the target violates the terms of the deal, then they will fail three death saves instantly, their maximum hit points will be reduced to zero, every molecule of their body will be burnt into nothingness by a purple flame, their soul (if they had one) will be sent to the lowest level of the nine circles of hell, and they cannot be revived or reincarnated unless a wish spell or something of equal or greater power is used to do so. The one who violates the terms of the deal cannot be saved from this death, and any spells that attempt to stop it outside of a wish spell will be instantly dispelled with the strength of a level 9 spell slot. If you use this spell and the creature denies the deal, then you regain the spell slot you used to cast this.