Locations
Steel Yourself for War
| Set Name | Mirrodin Besieged |
| Block | Set 2 of 3 in the Scars of Mirrodin block |
| Abbreviation | MBS |
| Number of Cards | 155 |
| Release Date | February 4, 2011 |
| Prerelease Events | January 29-30, 2011 |
| Launch Parties | February 4-7, 2011 |
| Design Team | Mark Gottlieb (lead)
Gregory Marques Ken Nagle Mark Rosewater Mike Turian |
| Dev. Team | Erik Lauer (lead)
Ryan Dhuse Tom LaPille Mike Turian |
Previously believed to be called "Mirrodin Pure" or "New Phyrexia" it was revealed on Aug. 3rd, 2010 to be called "Mirrodin Besieged."
