mtg dual sided cards double How To Use Double Faced Cards In Magic: The Gathering MTG 10 Double-Sided Card Checklist,

Our proxy can be used for kitchen table magic, a proxy for deck testing, act as additional copies of those expensive cards that you already own, players who looking for altered art of a card that they like or to use as their Commander, cube, EDH / CEDH games with friends who welcome proxies

You see, when we did the Grand Creature Update many years ago (which, among other things, changed all individual bird creature types into Bird), no one bothered to update the silver-bordered cards

Eisenhorn is an inquisitor, so naturally he investigates, and he turns your library into the Malus Codicium itself to summon Cherubael

Even so it is always nice to air some different cards when the deck suits them