Whir of Invention

Type: Instant

Mana cost: {X}{U}{U}{U}

Card text: 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.

Rarity: rare

Artist: Christine Choi

Released: January 20, 2017