Instant, 1W (2) Radiance - Choose a color. Target creature and each other creature that shares a color with it gain protection from the chosen color until end of turn. Truth shines even in darkness. Those who march on the side of truth walk always in righteous light.
Illus. Alex Horley-Orlandelli
10/1/2005: The color you choose as the spell resolves has nothing to do with the color or colors shared by the affected creatures.
10/1/2005: All creatures that share a color are affected, even your own.
10/1/2005: A creature "shares a color" with any creature that is at least one of its colors. For example, a green-white creature shares a color with creatures that are green, white, green-white, red-white, black-green, and so on.
10/1/2005: If it targets a colorless creature, it doesn't affect any other creatures. A colorless creature shares a color with nothing, not even other colorless creatures.
10/1/2005: You check which creatures share a color with the target when the spell resolves.
10/1/2005: Only one creature is targeted. If that creature leaves the battlefield or otherwise becomes an illegal target, the entire spell is countered. No other creatures are affected.
Ravnica: City of Guilds
(Uncommon)