Bind Soul (Immortal Magic)

Master Discipline: Hells

You name a creature anywhere in the multiverse. You can say the creature's true name, a moniker, or even a title. That creature is instantly summoned, along with everything it is wearing or carrying, to a point you choose within 10 feet of you. If you have not prepared a meeting place beforehand, this spell procures all materials needed, including furniture and a light source, and will alter the terrain to fit. The spell allows you both to understand each other, no matter the intelligence or spoken languages of either party. The creature you summoned can negotiate any term from you, which the spell instantly grants you the ability to fulfill after the casting time, and you can negotiate any price for the service requested.

Once the casting time is complete, you instantly learn the target's true name if you didn't know it already. You can invoke the creature's true name once per long rest to cast the suggestion spell on it.

If the creature you summoned fails to hold up its end of the deal, it takes 3d6 + your spellcasting ability modifier psychic damage every 24 hours until it dies, fulfills its end of the deal, or you end the spell. If the creature dies as a result of this spell, its soul is trapped as a ghost under your control.