mtg eldrazi unbound commander deck Masters Commander Bundle (4 Decks) etched Display Commander (a thick cardstock copy of the commander card with foil etched into the card’s border and art) Magic: The Gathering "Commander Masters"

It can remove most creatures with one or two activations of its ability, so Breya can keep your opponents boards from getting too dangerous as long as you have a consistent way of creating artifacts

At the low cost of one generic, one blue, you could very quickly build an army of Persistent Petitioners

You have no maximum hand size and don't lose the game for having 0 or less life

What makes it so great is that its easy to recur, tutor for, flicker, and clone

RiotRunner789 on When is it Acceptable, if 10 months ago With some digging: Runic Repetition, Karn, the Great Creator, Kaya the Inexorable, and Mirror of Fate can all pull cards from exile (though with restrictions)