Whir of Invention [Aether Revolt Prerelease Promos] Duel Decks Anthology Set: Innistrad Type: Enchantment Rarity:

Set: Innistrad Type: Enchantment Rarity: Rare Cost: {3}{G} If an effect would create one or more tokens under your control

Karma deals damage to that player equal to the number of Swamps they control

Set: Alpha Edition Type: Enchantment Rarity: Rare Cost: {3}{R} Whenever a player taps a land for mana

Set: Mercadian Masques Type: Instant Rarity: Rare Cost: {1}{W} Exile all creature cards from all graveyards

When that mana is spent to cast an instant or sorcery spell

Whir of Invention [Aether Revolt Prerelease Promos] Duel Decks Anthology Set: Innistrad Type: Enchantment Rarity:Set: Aether Revolt Prerelease Promos Type: Instant Rarity: Rare Cost: {X}{U}{U}{U} Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.) Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle.