Conjurer's Ban | Magic: The Gathering
Formats Conjurer's Ban is Legal in
Official Oracle Text for Conjurer's Ban
Draw a card.
Official Rulings for Conjurer's Ban
2/1/2006 : You may name a land card to prevent it from being played.
2/1/2006 : Conjurer's Ban only affects cards. A copy of a card (for example, one created by Eye of the Storm isn't a card, so it can be played.
8/1/2008 : This can't be used as a counterspell. It will have no effect on spells which were on the stack when it was cast, nor on those cast in response to it.