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 - $9.00
Lightly Played - $8.50
Moderately Played - $7.25
Heavily Played - $5.50
Damaged - $4.50
Near Mint Non-English - $9.00
Lightly Played Non-English - $8.50
Moderately Played Non-English - $7.25
Heavily Played Non-English - $5.50
Damaged Non-English - $4.50