Whir of Invention [Aether Revolt Promos] Unglued Set: Core Set 2020 Prerelease

Set: Core Set 2020 Prerelease Promos Type: Legendary Creature — Angel Rarity: Rare Cost: {4}{W}{W}{W} You may pay {W} and tap four untapped creatures you control with flying rather than pay this spell's mana cost

you may search your library for a Forest or Plains card

in the absence of quality

They just know

Whir of Invention [Aether Revolt Promos] Unglued Set: Core Set 2020 PrereleaseSet: Aether Revolt 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.