Whir of Invention [Aether Revolt Prerelease Promos] Kaladesh where X is that spell's

where X is that spell's mana value

Set: Beta Edition Type: Sorcery Rarity: Rare Cost: {B}{B}{B} Remove Darkpact from your deck before playing if you're not playing for ante

lavamancer

Selesnya evangel

Set: Unhinged Type: Artifact Rarity: Uncommon Cost: {1} {1}: Flip a coin

Whir of Invention [Aether Revolt Prerelease Promos] Kaladesh where X is that spell'sSet: 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.