At the beginning of your precombat main phase, add {B} for each charge counter on Altar of Shadows. {7}, {T}: Destroy target creature. Then put a charge counter on Altar of Shadows.
Near Mint - $0.95
Lightly Played - $0.90
Moderately Played - $0.71
Heavily Played - $0.57
Damaged - $0.38
Near Mint Non-English - $0.95
Lightly Played Non-English - $0.90
Moderately Played Non-English - $0.71
Heavily Played Non-English - $0.57
Damaged Non-English - $0.38
Foil Prices
Near Mint Foil - $1.25
Lightly Played Foil - $1.00
Moderately Played Foil - $1.00
Heavily Played Foil - $0.75
Damaged Foil - $0.50
Near Mint Foil Non-English - $1.25
Lightly Played Foil Non-English - $1.00
Moderately Played Foil Non-English - $1.00
Heavily Played Foil Non-English - $0.75
Damaged Foil Non-English - $0.50