Suddenly your Leyline Bindings are answering two permanents, your evoke Elementals become super-charged double triggering when they enter the battlefield, your Fable of the Mirror-Breaker is making double the Goblin tokens, and this isnt even considering the possibility of actually building around Elesh Norn in some sort of ETB heavy Soulherder or Ephemerate blink shell
It hit shelves on September 22, and it includes 62 cards, not including Secret Rare cards
Thus, in theory, it would be possible to design packaging or even cards in such a way that could show some kind of change if it were to receive a dose of radiation from an X-ray machine
Table of Contents show What Are Play Boosters in MTG
In Commander that means it will trigger every time you cast a creature spell or cheat a nontoken creature into play
You then receive a booster minus one card from the player on your left and pick one card from it