This is similar to the Digimon card game, which Ryan Miller was involved in designing
If opened, it cannot be listed as sealed
The design space of hidden info is one that I enjoy seeing explored, where your format knowledge is rewarded by being able to predict what cards your opponent might have readied against you
Outside of Standard, some archetypes may look to use both Satyr Wayfinder and Town Greeter
The first cards for Disney Lorcana, the upcoming trading card game starring characters from the House of Mouse, have been revealed at D23 - and theres more than a touch of Magic: The Gathering to them
Speaking of characters that can shift, Sisu, Empowered Sibling is a very solid character that can turn a game in a single turn