Mirrodin Besieged Game Day – March 5-6
The upcoming game day will be the first chance to get hold of cards from the next set, at this stage codename ‘Action’. When the set is finally released, ‘Action’ will be either Mirrodin Pure or New Phyrexia. But not both.
Although WOTC have already decided what they are going to call the new set. They figure that, if they don’t say at this stage, you can pick a side at the game day without knowing who is going to win.
so, at the Mirrodin Besieged Game Day, on March 5 and 6, if you pick to play a Mirran-affiliated deck and win, you’ll get a card from Mirrodin Pure, (Pristine Talisman) and if you pick to play Phyrexian-affiliated deck and win, you’ll get a card from New Phyrexia (Suture Priest). You don’t have to do either one, but the Action cards will only go to the top players from each faction.
The factionalization rules are the same as those for the Scars of Mirrodin Game Day.
Both cards will be in ‘Action’, but one of them won’t be printed with the expansion symbol you see on the ones from the game day.
Original Article – http://www.wizards.com/Magic/Magazine/Article.aspx?x=mtg/daily/arcana/647