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 - $1.500
Moderately Played - $1.300
Heavily Played - $1.100
Damaged - $1.000
Near Mint Spanish - $1.900
Lightly Played Spanish - $1.500
Moderately Played Spanish - $1.300
Heavily Played Spanish - $1.100
Damaged Spanish - $1.000