Contractual Obligation

You shake hands with a willing creature who has slashed their hand after you have slashed yours. A piece of parchment and a quill will appear above the connected hands and begin to write a contract explained by you to the other creature. Once both parties have agreed to the terms, the contract vanishes, and the terms set must be followed.

If the contract is somehow broken, then the party who broke the agreement suffers 10d6 psychic damage. This does not happen if an outside force dispels the contract by using Remove Curse or something with a similar effect on both parties.