If a commander has a static ability that causes a player to choose its color before the game begins, that choice applies during deck construction and throughout the game, even as the commander changes zones. That choice affects the commander’s color identity. The player reveals that choice as they put their commander into the command zone before the game begins. See rules 103.2c and 607.2p.
November 20, 2020 · Commander Legends
If a commander has a static ability that causes a player to choose its color before the game begins, that choice applies during deck construction and throughout the game, even as the commander changes zones. That choice affects the commander’s color identity. The player reveals that choice as they put their commander into the command zone before the game begins. See rules 103.2c and 607.2n.
May 3, 2019 · War of the Spark
Reminder text is ignored when determining a card’s color identity. See rule 207.2.
January 25, 2019 · Ravnica Allegiance
Reminder text is ignored when determining a card's color identity. See rule 207.2.
February 1, 2014 · Born of the Gods
Reminder text is ignored when determining a card’s color identity. See rule 207.2.
September 30, 2011 · Innistrad
Reminder text is ignored when determining a card's color identity. See rule 207.2.
June 17, 2011 · Commander 2011
Reminder text is ignored when determining a commander’s color identity. See rule 206.2.
April 1, 2011 · Duel Decks: Knights vs. Dragons
Reminder text is ignored when determining a commander's color identity. See rule 206.2.
February 4, 2011 · Mirrodin Besieged
Reminder text is ignored when determining a commander’s color identity. See rule 206.2.
February 1, 2010 · Worldwake
Other than basic lands, each card in an EDH deck must have a different English name.