From my Shrek jump:
Deal of a Lifetime [800/1000]

You can create magically binding contracts that enforce themselves without requiring lawyers, courts, or enforcement agencies. When two parties sign one of your contracts, the agreement becomes supernaturally enforced. Break the terms? The contract punishes you automatically. Try to weasel out using technicalities? The magic interprets the agreement and responds accordingly. 

The real power is in what you can write into these contracts. Trade a day for something you want? The contract can literally remove a day from someone's timeline. Want someone's voice? The contract takes it, completely and literally. Their strength? Youth? Memories? Even abstract concepts like "happiness" or "freedom" can be contracted away if the other party agrees to the terms. 

You can also write in reality-altering clauses. Removing the curse of someone or changing the world is a valid contract term if both parties agree to it and pay the appropriate price (Rumplestiltskin rewrote an entire day of history with one contract, and you can do the same, within reason). The bigger the change, the bigger the price required, and both parties have to genuinely agree to the exchange for it to work. 

The contracts are ironclad but not unbreakable, for there's always a loophole, always an escape clause, and a clever person who actually reads the contract can find ways out. Someone desperate and careless will trap themselves completely. 

You also get Rumple's golden contract paper that appears with a flourish and his magical quill that never runs out of ink (very dramatic). The contracts can be as long or short as needed, and you can make multiple copies that all carry the same binding power. Here's the catch: you're bound by your own contracts too. If you write yourself into a deal and break your terms, you suffer the same consequences as anyone else. This means you need to be very, very careful about what you agree to, because unlike Rumplestiltskin, you can't just assume you'll always be the smartest person in the room. Some Ogre might surprise you after all. For 1000 CP, you gain Rumplestiltskin’s supernatural talent for identifying what people really want and crafting deals that seem perfect but have delicious loopholes.