Jay4prez wrote:Since your commander is identified for the colors White and Green, you cannot use cards that can be identified to other colors.
For example, your Archers' Parapet cannot be used in your deck because of the above.
To expand on this, a card's
color identity is defined by any mana symbols in the mana cost of the card or any abilities it has. A commander (EDH) deck can only contain cards that have a color identity included in the commander's color identity.
Archers' Parapet, for example, is a Green card (since it only costs green mana to cast), BUT it's color identity is black/green because of the black mana in it's ability. Therefore it can only be used in commander decks in which the commander is both black and green.
Other examples of color identities:
Bosh, Iron Golem is red.
Memnarch is blue.
Qasali Pridemage is green/white.
Kitchen Finks is green/white.
Selesnya Signet is green/white.
Hypergenesis is green.
Fetch lands such as
Flooded Strand are colorless.(See, no mana symbols)
Basic lands are their respective colors. (
Plains is white.)
The one exception to this is that mana symbols in reminder text don't count.
Blind Obedience is a white card with a mono-white identity because the black symbol is in the reminder text. Dual lands like
Steam Vents are their respective colors because of
Rule 305.6.