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Mirrodin

Assert Authority

5UU

Instant

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)

Counter target spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.

Market estimate · ~24h

$0.36 – $3.70

Nonfoil $0.36 Foil $3.70 Cardmarket €0.23

TCGplayer & Cardmarket market price

Card data via Scryfall. Paper market figures use TCGplayer market price and Cardmarket values that Scryfall syncs from affiliates. View on Scryfall · How Scryfall prices work . Prices refresh about every 24 hours — useful estimates, not a live storefront and not an in-stock offer. Tappr is not the seller. Page checked 2026-11-02 19:11 UTC.

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Set

Mirrodin

Number

#30

Artist

Greg Hildebrandt

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