Whir of Invention (86) - BORDERLESS (mythic) | LP

This is a Lightly Played card, from the Special Guests set. It has a color identity of: 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.