Numerical symbols (such as {1}) and variable symbols (such as {X}) represent generic mana in costs. Generic mana in costs can be paid with any type of mana. For more information about {X}, see rule 107.3.
September 30, 2011 · Innistrad
Numeral symbols (such as {1}) and variable symbols (such as {X}) represent generic mana in costs. Generic mana in costs can be paid with any type of mana. For more information about {X}, see rule 107.3.
June 17, 2011 · Commander 2011
Numeral symbols (such as {1}) and variable symbols (such as {X}) represent generic mana
February 4, 2011 · Mirrodin Besieged
Numeral symbols (such as {1}) and variable symbols (such as {X}) represent generic mana in costs. Generic mana in costs can be paid with any type of mana. For more information about {X}, see rule 107.3.
October 1, 2010 · Scars of Mirrodin
Numeral symbols (such as {1}) and variable symbols (such as {X}) represent generic mana
February 1, 2010 · Worldwake
Numeral symbols (such as {1}) and variable symbols (such as {X}) represent generic mana in costs. Generic mana in costs can be paid with any type of mana. For more information about {X}, see rule 107.3.