Contamination [Urza's Saga] Commander 2013 During a hunt they often

During a hunt they often call to each other

Each one then blocks all creatures the other was blocking

Whenever an opponent taps a land for mana

Set: Duel Decks Anthology Type: Instant Rarity: Common Cost: {3}{B} If you control a Swamp

Set: Alpha Edition Type: Enchantment — Aura Rarity: Common Cost: {U}{U} Enchant creature

Contamination [Urza's Saga] Commander 2013 During a hunt they oftenSet: Urza's Saga Type: Enchantment Rarity: Rare Cost: {2}{B} 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.