Card Codex

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17 May 2024: Card library updated.

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.

Similar cards

Color identity:
NameManaTypeText
Lofty Denial 1UInstant Counter target spell unless its controller pays {1}. If you control a creature with flying, counter that spell unless its controller pays {4} instead.
Minamo's Meddling 2UUInstant Counter target spell. That spell's controller reveals their hand, then discards each card with the same name as a card spliced onto that spell.
Metallic Rebuke 2UInstant Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.) Counter target spell unless its controller pays {3}.
Logic Knot XUUInstant Delve (Each card you exile from your graveyard while casting this spell pays for {1}.) Counter target spell unless its controller pays {X}.
Lose Focus 1UInstant Replicate {U} (When you cast this spell, copy it for each time you paid its replicate cost. You may choose new targets for the copies.) Counter target spell unless its controller pays {2}.
Broken Ambitions XUInstant Counter target spell unless its controller pays {X}. Clash with an opponent. If you win, that spell's controller mills four cards. (Each clashing player reveals the top card of their library, then puts that card on the top or bottom. A player wins if their card had a higher mana value.)
Clash of Wills XUInstant Counter target spell unless its controller pays {X}.
Convolute 2UInstant Counter target spell unless its controller pays {4}.
Flaccify 2UInstant Counter target spell unless its controller pays {3}{½}.
Force Spike UInstant Counter target spell unless its controller pays {1}.
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