Whenever you cast your first spell during each opponent's turn, look at the top card of that player's library, then exile it face down. You may play that card for as long as it remains exiled, and mana of any type can be spent to cast it.
Near Mint - $1.900
Lightly Played - $1.600
Moderately Played - $1.400
Heavily Played - $1.200
Damaged - $1.000
Near Mint Spanish - $1.900
Lightly Played Spanish - $1.600
Moderately Played Spanish - $1.400
Heavily Played Spanish - $1.200
Damaged Spanish - $1.000