Syndic of Tithes | Magic: The Gathering
Formats Syndic of Tithes is Legal in
Official Oracle Text for Syndic of Tithes
—Notice outside Vizkopa Bank
Official Rulings for Syndic of Tithes
4/15/2013 : The amount of life you gain from extort is based on the total amount of life lost, not necessarily the number of opponents you have. For example, if your opponent's life total can't change (perhaps because that player controls Platinum Emperion), you won't gain any life.
4/15/2013 : The extort ability doesn't target any player.