Crypt Ghast | Magic: The Gathering
Formats Crypt Ghast is Legal in
Official Oracle Text for Crypt Ghast
Whenever you tap a Swamp for mana, add to your mana pool (in addition to the mana the land produces).
Official Rulings for Crypt Ghast
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.