Whir of Invention magic card front
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 converted mana cost x or less, put it onto the battlefield, then shuffle your library.

Whir of Invention prices from Mystery Booster

Rarity rare
Types Instant
Reprints 6
Date Range 2022-12-02 - 2023-12-02

Whir of Invention from Mystery Booster's Price Analysis

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6 Total Variations/Printings of Whir of Invention

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