name: Contamination
originalText: During your upkeep, sacrifice a creature or sacrifice Contamination.\nWhenever a land is tapped for mana, it produces o\nB instead of its normal type and amount.
printings: 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.