mtg prison cards Magic: The Gathering Creatures cant attack you unless their controller pays 2 for each creature he or she controls thats attacking you. MTG Cube: Red Prison .dec

When you actually read it though, you realize that it's a Crucible of Worlds with hands that your opponents will catch

Also, it doesnt hurt that this commander has an activated ability to mill opponents

This means you can catch the token player off guard when they dont heed your warning to not attack into you with that Craterhoof Behemoth they just dropped

When any face down creature dies or is removed from the battlefield (even if a player leaves the game) it is revealed

In fact, Mark Rosewaters blog is a great hint that this may be possible

Growing Ranks In a deck that constantly produces tokens, populating every turn is nice