Text (UD+errata): 2/2. ; When ~this~ is put into a graveyard from the battlefield, exile all creatures. [Oracle 2009/07/08]
Only removes creatures from the game, which means only creature permanents which are in play. It won't remove itself since it is already in the graveyard. [Urza's Destiny FAQ 1999/05/25]
Note - This card was creature type "Cleric" until Oracle 2007/10/01, when it became "Human Cleric".
