Contamination [Urza's Saga] Lightning[×2] Set: Commander Masters Type: Legendary

Set: Commander Masters Type: Legendary Creature — Human Artificer Rarity: Mythic Cost: {2}{U}{U} When Urza

Set: Invasion Type: Artifact Rarity: Rare Cost: {2} When Tsabo's Web enters the battlefield

Set: World Championships 2012 Type: Psychic Rarity: Ultra Rare Retreat cost: Colorless

put that card onto the battlefield

Set: Sword & Shield: Lost Origin Type: Lightning Rarity: Secret Rare Retreat cost: Colorless

Contamination [Urza's Saga] Lightning[×2] Set: Commander Masters Type: LegendarySet: 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.