If you're the monarch, each of those players mills ten cards instead
Youre also on a given plane doing battle, so you could be on Alara at a given moment but then planeswalk to Tarkir, and after that planeswalk to Ravnica, and so on
One of the payoffs was Stonebound Mentor, a card that provides some value by filtering your draws throughout the game as you repeatedly exile cards
These include cards such as Kozilek (card draw, counter), Deepfathom Skulker (card draw, unblockable), Sire of Stagnation (card draw), Oblivion Sower (land fetch), Desolation Twin (creature token), Drowner of Hope (creature tokens, tap), World Breaker (removal), Hideous Taskmaster (steal, annihilator), etc
The sheer potential for Guardian Project to turn each creature in your Commander deck into a cantrip is strong enough to place it on this list, but Guardian Project is held back by everything else
Our rare