In his May 24 column, Mark Rosewater confirmed that the "Infect" game mechanic in Scars of Mirrodin would bring poison counters back to Magic.

All cards (other than basic lands) in the Scars of Mirrodin block carried a watermark, either Mirran or Phyrexian.

[10] In the original announcement from December 9, 2010 it was left open whether this set would be named New Phyrexia or Mirrodin Pure.

Notable cards from Scars of Mirrodin include Mox Opal, Memnite and Sword of Body and Mind.

Notable cards from Mirrodin Besieged include Blightsteel Colossus, Sword of Feast and Famine and Green Sun's Zenith.

Notable cards from New Phyrexia include Elesh Norn, Grand Cenobite, Birthing Pod,[15] Dismember,[16][17] Mental Misstep,[18] Gitaxian Probe, Karn Liberated and Sword of War and Peace, which completed the Swords cycle begun in the Mirrodin block.