You should take a tempting offer if youre clearly behind, and if the player casting the tempting offer spell wont benefit that much from your choice
For seven mana, Agent of Treachery is a 2/3 which steals a permanent from one of your opponents when it enters play
In a situation where you do build around Gush to its full potential, this would take the number two spot
Clearly you want this in an artifact-themed deck, especially if youre sacrificing them, but treasure themes also help it along, as does any kind of resource token deck like Blood tokens or Junk tokens
After seeing popular Eldrazi creatures top the price list from previous sets, this doesn't come as much of a surprise
Other than a small batch of Starter Deck cards way back in April, Magic: The Gatherings Final Fantasy set has been surprisingly leak-free