You may look at the top card of your library any time. You may cast spells from the top of your library by sacrificing a nonland permanent in addition to paying their other costs.
Duskmourn never yields its secrets without exacting a brutal price.
Near Mint - $0.70
Lightly Played - $0.60
Moderately Played - $0.50
Heavily Played - $0.40
Damaged - $0.40
Near Mint Spanish - $0.70
Lightly Played Spanish - $0.60
Moderately Played Spanish - $0.50
Heavily Played Spanish - $0.40
Damaged Spanish - $0.40