The Zephyr Maze Plane: Kyneth Creatures with flying get +2/+0.Creatures without flying get -2/-0
You can obviously force the issue with symmetrical card draw, and it has legs in group hug decks, too
One last interesting point is the overlap between Affinity and the Domain decks
When warping, the owner reveals the top card of their library and puts it into play if its a permanent
Imagine having a bunch of creatures on the battlefield plus Vigor, then casting Blasphemous Act: all your opponent's creatures die, your other creatures get 13 +1/+1 counters, swing and win
patent 6,254,096: Device and method for continuously shuffling cards A submission to the UK Gambling Commission by a shuffling machine vendor casinocitytimes.com article: How Much of a Threat Are Shuffle-Trackers