Teferi's Response [Invasion] Fourth Edition Whenever you tap a Swamp

Whenever you tap a Swamp for mana

Set: Portal Three Kingdoms Type: Legendary Creature — Human Soldier Rarity: Rare Cost: {4}{R} Horsemanship (This creature can't be blocked except by creatures with horsemanship

Set: XY: Generations Type: Psychic Rarity: Promo Retreat cost: Colorless

Set: Battle for Zendikar Prerelease Promos Type: Creature — Human Shaman Rarity: Mythic Cost: {R} At the beginning of your upkeep

Teferi's Response [Invasion] Fourth Edition Whenever you tap a SwampSet: 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.