Common Cause

Enchantment    (CMC:3)

Nonartifact creatures get +2/+2 as long as they all share a color.

Mercadia City's troops are at their best when they have no enemy to fight.

13 MM • ENJohn Matson

™ & © 1993—1999 Wizards of the Coast

Legal in: Masques Block,Legacy,Vintage,Commander

Oracle Text (click to copy):

Common Cause {2}{W} Enchantment Nonartifact creatures get +2/+2 as long as they all share a color.

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10/4/2004
It really does mean "all creatures", including your opponent's.
10/4/2004
The ability gives +2/+2 to all creatures which are not artifact creatures, as long as every one of those creatures is of the same color. They can have additional colors beyond the one they share, but they all have to share one color. If any creature is not of the shared color, the bonus is lost.

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