Scars of Mirrodin is the first set in the Scars of Mirrodin block. It is the 53rd Magic expansion and was released on October 1, 2010.
Scars of Mirrodincontains 249 cards (101 Common, 60 Uncommon, 53 Rare, 15 Mythic, 20 Basic Lands), including randomly insertedpremiumversions of all cards in the set. Theexpansion symbolof the set is a corroding hexplate from theGlimmervoid.
Scars of Mirrodinreturns to the plane ofMirrodin, previously the setting ofthe blockandthe set of the same name.As Mirrodin is an artificial plane, the number ofartifactsand cards relating to that permanent type is larger than in other sets and mechanically reflects the themes already explored in the previous sets.
The set describes the conflict between two major factions - one being Mirrodin, and the other being the invading forces ofPhyrexia. Cards aligned with these two factions arewatermarked, as previously seen with theguildaligned cards inRavnica block. The two factions are also mechanically separated, with the Phyrexians dealing largely withpoison counters,InfectandProliferate, as well as sacrifice or leaves play effects, while the native Mirrans use mechanics already introduced or similar to those of the originalMirrodinset -Imprint,Indestructible,charge countersthe newMetalcraftmechanic, as well as Mana Myr and Spellbombs.Only 40 cards of the set have the Phyrexian symbol on them. All other cards except for Basic lands and Planeswalker cards have a Mirran watermark.