Contract

You create a magical binding contract on a piece of parchment as one of the spell components of this spell. The ink begins to fill out the contract in specific details as you desire, changing and altering the words on the parchment that you deem necessary as you cast this spell over the course of an hour. At the end of the hour, the parchment becomes a magical item which is a binding contract between you and another creature that you specify in the contract, or a contract specifying two other creatures instead. Alternatively, you may have the contract not list any creature specifically and instead effects the next creature that signs it.

To create the contract, you must specify the purpose of the contract and any rules those listed on it must follow in a language you are proficient in. You must specify when the contract is to be completed and if the contract has a time frame to be completed by. And you must specify what happens when the contract becomes unfulfilled or if any of the rules are broken. You may write as much detail as you prefer, so long as you have enough parchment and ink to write out the details of the contract. 

The contract remains as a magical item until it is dispelled or the contract is signed. Once the contract is signed, it burns to ash, magically binding all creatures that have signed it. When this happens, the contract rules become in effect until it is either completed or unfulfilled. Once the creatures are bound to the contract it cannot be dispelled, and nothing short of a wish spell can break this binding. If any creatures bound by the contract die, the contract becomes unfulfilled by that creature.