The color of the expansion symbol indicates the rarity of the card within its set. A red-orange
April 1, 2011 · Duel Decks: Knights vs. Dragons
The color of the expansion symbol indicates the rarity of the card within its set. A red-orange symbol indicates the card is mythic rare. A gold symbol indicates the card is rare. A silver symbol indicates the card is uncommon. A black or white symbol indicates the card is common or is a basic land. A purple symbol signifies a special rarity; to date, only the _Time Spiral_(R) "timeshifted" cards, which were rarer than that set's rare cards, have had purple expansion symbols. (Prior to the _Exodus_(TM) set, all expansion symbols were black, regardless of rarity. Also, prior to the _Sixth Edition_ core set, with the exception of the Simplified Chinese _Fifth Edition_ core set, _Magic_ core sets didn't have expansion symbols at all.)
February 4, 2011 · Mirrodin Besieged
The color of the expansion symbol indicates the rarity of the card within its set. A red-orange symbol indicates the card is mythic rare. A gold symbol indicates the card is rare. A silver symbol indicates the card is uncommon. A black or white symbol indicates the card is common or is a basic land. A purple symbol signifies a special rarity; to date, only the Time Spiral® “timeshifted” cards, which were rarer than that set’s rare cards, have had purple expansion symbols. (Prior to the Exodus™ set, all expansion symbols were black, regardless of rarity. Also, prior to the Sixth Edition core set, with the exception of the Simplified Chinese Fifth Edition core set, Magic core sets didn’t have expansion symbols at all.)
October 1, 2010 · Scars of Mirrodin
The color of the expansion symbol indicates the rarity of the card within its set. A red-orange
July 16, 2010 · Magic 2011
The color of the expansion symbol indicates the rarity of the card within its set. A red-orange symbol indicates the card is mythic rare. A gold symbol indicates the card is rare. A silver symbol indicates the card is uncommon. A black or white symbol indicates the card is common or is a basic land. A purple symbol signifies a special rarity; to date, only the Time Spiral(R) "timeshifted" cards, which were rarer than that set's rare cards, have had purple expansion symbols. (Prior to the Exodus(TM) set, all expansion symbols were black, regardless of rarity. Also, prior to the Sixth Edition core set, with the exception of the Simplified Chinese Fifth Edition core set, _Magic_ core sets didn't have expansion symbols at all.)
June 18, 2010 · Archenemy
The color of the expansion symbol indicates the rarity of the card within its set. A red-orange symbol indicates the card is mythic rare. A gold symbol indicates the card is rare. A silver symbol indicates the card is uncommon. A black or white symbol indicates the card is common or is a basic land. A purple symbol signifies a special rarity; to date, only the _Time Spiral_(R) "timeshifted" cards, which were rarer than that set's rare cards, have had purple expansion symbols. (Prior to the _Exodus_(TM) set, all expansion symbols were black, regardless of rarity. Also, prior to the Sixth Edition core set, with the exception of the Simplified Chinese _Fifth Edition_ core set, _Magic_ core sets didn't have expansion symbols at all.)
April 23, 2010 · Rise of the Eldrazi
The color of the expansion symbol indicates the rarity of the card within its set. A red-orange symbol indicates the card is mythic rare. A gold symbol indicates the card is rare. A silver symbol indicates the card is uncommon. A black or white symbol indicates the card is common or is a basic land. A purple symbol signifies a special rarity; to date, only the Time Spiral(R) "timeshifted" cards, which were rarer than that set's rare cards, have had purple expansion symbols. (Prior to the Exodus(TM) set, all expansion symbols were black, regardless of rarity. Also, prior to the Sixth Edition core set, with the exception of the Simplified Chinese Fifth Edition core set, _Magic_ core sets didn't have expansion symbols at all.)
February 1, 2010 · Worldwake
The color of the expansion symbol indicates the rarity of the card within its set. A red-orange symbol indicates the card is mythic rare. A gold symbol indicates the card is rare. A silver symbol indicates the card is uncommon. A black or white symbol indicates the card is common or is a basic land. A purple symbol signifies a special rarity; to date, only the _Time Spiral_(R) "timeshifted" cards, which were rarer than that set's rare cards, have had purple expansion symbols. (Prior to the _Exodus_(TM) set, all expansion symbols were black, regardless of rarity. Also, prior to the _Sixth Edition_ core set, with the exception of the Simplified Chinese _Fifth Edition_ core set, _Magic_ core sets didn't have expansion symbols at all.)