How long will mirrodin besieged be in standard

9 thg 2, We've only seen whispers of the Tezzeret decks so far, but it would be surprising if the solo Planeswalker to come out of Mirrodin Besieged. As Mirrodin Besieged enters the battlefield, choose Mirran or Phyrexian. loses the game if there are fifteen or more artifact cards in your graveyard. listings on TCGplayer for Decimator Web - 4, T: Target opponent loses 2 life, gets a poison counter, then puts the top six cards of his or her library.