The cards come from the 20 rares and mythic rares in ONC, the 5 rares from ONE Jumpstart , and the 8 rares and mythic rares that are new-to-Commander cards found in Set Boosters
I liked it because it had a little nod to the Eldrazi without actually requiring any Eldrazi in the set
Matching your opponent's hand can be difficult, but this format gives Yanmega access to both Judge () and Copycat () as ways to guarantee that Insight works
Losing access to green means you wouldnt get to play a beautiful foil Cartographer or any of the other green explorers, but if thats not a dealbreaker, Ive put a rough list together for this build over on Archidekt
Ive gone for Tendershoot Dryad, and I think a lot of players would agree
Its not quite as much fun as Play of the Game, but its going to get the job done in very efficient fashion