name: Contamination
originalText: At the beginning of your upkeep, sacrifice Contamination unless you sacrifice a creature.\nIf a land is tapped for mana, it produces {B} instead of any other type and amount.
printings: MB2, PLST, USG
text: At the beginning of your upkeep, sacrifice Contamination unless you sacrifice a creature.\nIf a land is tapped for mana, it produces {B} instead of any other type and amount.