10 (and 11, 12, 13 and 14)
Adventures are great because they fit with cards that care about casting spells from exile, but this particular adventure also puts cards into exile for you
I assume it went through the system with that price guide as reference and no card was upcharged fortunately
I think technically you and a friend could meet face to face to magic dual (with only a few slight more additions to functionality needed)
At this point, we need a shakeup, and emerge decks are going to challenge G/W Tokens on the fronts it isnt prepared to fight on
Super duper honorable mentions would be any of the slow line of aquapolis by Kusube (masterpiece line), giovannis person, expedition pidgeot, skyridge steelix, aquapolis mr mime, illustrator mr mime, skyridge sandshrew, golem ex and magcargo ex from ex dragon, and so, so many more