Edh

[General Kiwi]

can I play {soulfire grand master} in a blue white edh deck? Does his ability make him be considered part red?

[rarehuntertay]

His color identity is URW, so no, you cannot run him in a UW deck

[Kaylesh]

903.4.: The Commander variant uses color identity to determine what cards can be in a deck with a certain commander. The color identity of a card is the color or colors of any mana symbols in that card's mana cost or rules text, plus any colors defined by its characteristic-defining abilities (see rule 604.3) or color indicator (see rule 204).
Example: Bosh, Iron Golem is a legendary artifact creature with mana cost {8} and the ability "{3}{R}, Sacrifice an artifact: Bosh, Iron Golem deals damage equal to the sacrificed artifact's converted mana cost to target creature or player." Bosh's color identity is red.

Hybrid colors are counted as both, double sided cards have the identity of both sides.
So SGM is as said {W}{U}{R}, and {Elbrus, the binding blade} is {B}, due to its back being black.

[General Kiwi]

Thank you everyone