At the beginning of your upkeep, sacrifice Contamination unless you sacrifice a creature.
If a land is tapped for mana, it produces {B} instead of any other type and amount.
Near Mint - $12.75
Near Mint Non-English - $12.75
Lightly Played - $12.25
Lightly Played Non-English - $12.25
Moderately Played - $10.25
Moderately Played Non-English - $10.25
Heavily Played - $7.75
Heavily Played Non-English - $7.75
Damaged - $6.50
Damaged Non-English - $6.50