Text (5th+errata): 3/3, Protection from Red. ; Creatures named Ivory Guardians get +1/+1 as long as an opponent controls a nontoken red permanent. [Oracle 2009/10/11]
Only gets the bonus once even if more than one other player has red permanents. [D'Angelo 1995/04/14]
Note - This card was creature type "Guardian" until Oracle 2007/10/01, when it became "Human Cleric". Then with Oracle 2008/01/01 it became "Giant Cleric".
