Quick disclaimer: there is a huge difference between proxy cards and counterfeit cards
The Epiphany players who may have been hoping to prey on such decks may be disappointed, but they'll have to test their mettle in other matchups
Until then, continue to direct your community to Mark Rosewater's announcement on Play Boosters and keep your eyes on this space for additional Play Booster details in the future.
If youre thinking of cards like dungeons, planes, and conspiracies, which can have their corresponding card type on them, these are all actual cards but arent considered card types because they serve as additional objects, much like dice, coins, and counters
Its not unreasonable to assume you might get to draw one or even two cards from Sram, but you shouldnt play it without enough ways to trigger it
Aang, Airbending Master Aang, Airbending Master plays very nicely with the frogs of Bloomburrow and the warp cards of Edge of Eternities , or any number of blink/self-bounce targets