Your deals can now be verbal deals, which gives you more room to maneuver with misleading language, riddles, and the like, such as the fae often do, rather than the fine print that devils favor. You are also able to deal with more esoteric goods. Such as the firstborn son of the customer. The Fae usually buy memories, services, or fealty. Your ability to navigate market prices has increased further. You are now able to tell what the market price of any goods would be in any universe you have been to previously. (Such as how much clean water would be worth in the fallout universe.)