Teferi's Response [Invasion] Fungus Dinosaur If that card's mana value

If that card's mana value is less than or equal to the sacrificed artifact's mana value

Those creatures fight each other

Set: International Collectors' Edition Type: Creature — Nightmare Horse Rarity: Rare Cost: {5}{B} Flying (This creature can't be blocked except by creatures with flying or reach

Iron Maiden deals X damage to that player

{T}: Target opponent mills a card

Teferi's Response [Invasion] Fungus Dinosaur If that card's mana valueSet: Invasion Type: Instant Rarity: Rare Cost: {1}{U} Counter target spell or ability an opponent controls that targets a land you control. If a permanent's ability is countered this way, destroy that permanent. Draw two cards.