The Dragons of Poppy Smoke.
When a man signs a contract with Old Scratch, Mr. Scratch, Boruta (or any local variant of the Devil), with the express purposes of attaining financial gain, is it stipulated that if he breaks his word he will be turned into like a Behemoth and that he shall bear this form until Judgment Day.
If he is the head of a family Old Scratch will curse these family members to be turned into valuable trinkets. The more he loved them the more valuable and brimming with dark magic they will be.
They are also to be given a coin for every sin they have committed in the name of the Lord written in Enochian. These coins will be marked with the sin, and the true name of the one who committed it.