Whir of Invention [Aether Revolt Prerelease Promos] Tribal Sorcery Target opponent chooses two of

Target opponent chooses two of those cards

to have but one anchor

Flashback—Tap an untapped white creature you control

Centuries ago

it drove between us and the Efrafans like a thousand thunderstorms with lightning

Whir of Invention [Aether Revolt Prerelease Promos] Tribal Sorcery Target opponent chooses two ofSet: 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.