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
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Moira and Teshar 3WBLegendary Creature — Phyrexian Spirit Bird Flying Whenever you cast a historic spell, return target nonland permanent card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step. If it would leave the battlefield, exile it instead of putting it anywhere else. (Artifacts, legendaries, and Sagas are historic.) 4/5
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Obsessive Skinner 1GCreature — Human Rogue When Obsessive Skinner enters the battlefield, put a +1/+1 counter on target creature. Delirium — At the beginning of each opponent's upkeep, if there are four or more card types among cards in your graveyard, put a +1/+1 counter on target creature. 1/1
Raven's Run Plane — Shadowmoor All creatures have wither. (They deal damage to creatures in the form of -1/-1 counters.) Whenever chaos ensues, put a -1/-1 counter on target creature, two -1/-1 counters on another target creature, and three -1/-1 counters on a third target creature.
Ferocious Tigorilla 3RCreature — Cat Ape Ferocious Tigorilla enters the battlefield with your choice of a trample counter or a menace counter on it. (A creature with menace can't be blocked except by two or more creatures.) 4/3
Mercenary Informer 2WCreature — Human Rebel Mercenary Mercenary Informer can't be the target of black spells or abilities from black sources. {2}{W}: Put target nontoken Mercenary on the bottom of its owner's library. 2/1
Immaculate Magistrate 3GCreature — Elf Shaman {T}: Put a +1/+1 counter on target creature for each Elf you control. 2/2
Nine-Ringed Bo 3Artifact {T}: Nine-Ringed Bo deals 1 damage to target Spirit creature. If that creature would die this turn, exile it instead.
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