Taking chaos very literally, Khrn the Betrayer is sure to spice up your games
1 2 3 4 A Brief History of Game #1: Wizards of the Coast: 1990-Present , archived from the original on 24 August 2006, retrieved 29 August 2013 History of Spellfire , archived from the original on 8 July 2013, retrieved 30 August 2013 "A Hatalom Krtyi Krtyajtk trtnete - Beholder Fantasy"
Before Time Spiral , the foil card in a Draft Booster would always replace a card of the same rarity in that pack
While I don't think we'd use this exact mechanic, it does open up some interesting design space I could see us tapping into one day
Translation: youre always getting something worth showing off
The design space is huge for cubes since they can be created with any theme in mind, and WotC loves to rock Powered Cube on Arena