Sorcery As an additional cost to cast Natural Order, sacrifice a green creature. Search your library for a green creature card and put it onto the battlefield. Then shuffle your library.1
10/4/2004: The sacrifice of a green creature is part of the cost and is paid on casting. You do not have a choice to pay this cost zero times or more than one time in order to multiply the effect.
10/4/2004: You do not have to find a green creature card if you do not want to.