You may look at the top card of your library any time. You may cast creature spells from the top of your library. You can spend mana of any type to cast creature spells.
Near Mint - $0.90
Lightly Played - $0.80
Moderately Played - $0.70
Heavily Played - $0.60
Damaged - $0.50
Near Mint Spanish - $0.90
Lightly Played Spanish - $0.80
Moderately Played Spanish - $0.70
Heavily Played Spanish - $0.60
Damaged Spanish - $0.50