Consecrated Sphinx | Magic: The Gathering
Formats Consecrated Sphinx is Legal in
Official Oracle Text for Consecrated Sphinx
Whenever an opponent draws a card, you may draw two cards.
Official Rulings for Consecrated Sphinx
6/1/2011 : The ability triggers once for each card an opponent draws. You choose whether to draw two cards as each of those abilities resolves.
6/1/2011 : If each player controls a Consecrated Sphinx, their abilities will cause each other to trigger until one player chooses not to draw cards.