Name: Cleansing Beam
Cost: {4}{R}
Types: Instant
Oracle Text: Radiance — Cleansing Beam deals 2 damage to target creature and each other creature that shares a color with it.
Set: Commander Anthology
Artist: Pat Lee
Number: 78

2005-10-01: 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.
2005-10-01: All creatures that share a color are affected, even your own.
2005-10-01: 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.
2005-10-01: Only one creature is targeted. If that creature leaves the battlefield or otherwise becomes an illegal target, the entire spell doesn’t resolve. No other creatures are affected.
2005-10-01: You check which creatures share a color with the target when the spell resolves.