Rule evolution
Rule 107.4c
Earliest archived Rules release: 2009-10-01 · 1 wording revision · 0 renumberings
Earliest archived Rules release107.4cDetails
Numeral symbols (such as {1}) and variable symbols (such as {X}) can also represent colorless mana if they appear in the effect of a spell or ability that reads "add [mana symbol] to your mana pool" or something similar. (See rule 107.3e.)
Wording changed107.4cDetails
Numeral symbols (such as {1}) and variable symbols (such as {X}) can also represent colorless mana if they appear in the effect of a spell or ability that reads "add [mana symbol] to your mana pool" or something similar.The colorless mana symbol {C} is used to represent one colorless mana, and also to represent a cost that can be paid only with one colorless mana.(See rule 107.3e.)