Shadowverse

The Chronogenesis portal will be an overpowered card, because back then, the portal had a lot of cards and was perfect for a decent DEM deck.

If we choose four expansions through a general vote, it would probably be good. I somehow thought about two, but Ment apparently suggested only one. One is too few, I think. Unless we allow players to choose different expansions separately for each of their classes - like playing as a Bahamut Dragon, Chronogenesis Portal, etc.