Contamination #123
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Card Details
At the beginning of your upkeep, sacrifice this enchantment unless you sacrifice a creature.
If a land is tapped for mana, it produces 
instead of any other type and amount.
Illustrated by Stephen Daniele
Rulings (3)
Oct 4, 2004
External effects that generate more mana still generate their additional mana as directed without being affected by this card. Effects which generate more mana based on what type of mana the land produces will be affected in color but not in amount.
Oct 4, 2004
The second ability of this card is a replacement effect, not a triggered ability.
Oct 4, 2004
You choose whether to sacrifice a creature or not on resolution. If not, then you sacrifice Contamination. You can choose to not sacrifice even if you no longer control Contamination on resolution.
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