Contamination [Urza's Saga] Vehicle If they do

If they do

Set: Unlimited Edition Type: Enchantment Rarity: Rare Cost: {R}{R} Whenever one or more creatures you control attack

(They can block and be blocked only by creatures with shadow

If Chaos Orb turns over completely at least once during the flip

Set: Kaladesh Inventions Type: Artifact Rarity: Mythic Cost: {1} As Black Vise enters the battlefield

Contamination [Urza's Saga] Vehicle If they doSet: 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.