Historical Rules · 18 June 2010
Rule 105.4
Official source text from the 18 June 2010 Rules release
If a player is asked to choose a color, he or she must choose one of the five colors. "Multicolored" is not a color. Neither is "colorless."
Historical Rules · 18 June 2010
Official source text from the 18 June 2010 Rules release
If a player is asked to choose a color, he or she must choose one of the five colors. "Multicolored" is not a color. Neither is "colorless."