Theres nothing special about the three set boosters contained within
[28] [29] Most sanctioned games for Magic: The Gathering under the Wizards Play Network (WPN) use a Constructed format that require players to create their decks from their own library of cards
That player may search their library for a land card with a basic land type, put it onto the battlefield, then shuffle." Better yet, this ability also costs one fewer mana to cast for each legendary creature you control
Optimus Prime, Hero can even be cast transformed if players wish, making the card just as flexible as a true Transformer
You can cheat out the Craterhoof or you can just cast it, it is powerful enough to be worth ramping to and isn't that pricey for a green card of such game ending potential
Cards from different players may be arranged in the stack at 90 degree angles to each other to make it easier to track whose card is next