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
Muddle the Mixture UUInstant Counter target instant or sorcery spell. Transmute {1}{U}{U} ({1}{U}{U}, Discard this card: Search your library for a card with the same mana value as this card, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)
Sorcerous Squall 6UUUSorcery Delve (Each card you exile from your graveyard while casting this spell pays for {1}.) Target opponent mills nine cards, then you may cast an instant or sorcery spell from that player's graveyard without paying its mana cost. If that spell would be put into a graveyard, exile it instead.
Prowling Serpopard 1GGCreature — Cat Snake This spell can't be countered. Creature spells you control can't be countered. 4/3
Power Conduit 2Artifact {T}, Remove a counter from a permanent you control: Choose one — • Put a charge counter on target artifact. • Put a +1/+1 counter on target creature.
Courage in Crisis 2GSorcery Put a +1/+1 counter on target creature, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
Ornery Kudu 2GCreature — Antelope When Ornery Kudu enters the battlefield, put a -1/-1 counter on target creature you control. 3/4
Guiding Voice WSorcery Put a +1/+1 counter on target creature. Learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.)
Slip Out the Back UInstant Put a +1/+1 counter on target creature. It phases out. (Treat it and anything attached to it as though they don't exist until its controller's next turn.)
Torrential Gearhulk 4UUArtifact Creature — Construct Flash When Torrential Gearhulk enters the battlefield, you may cast target instant card from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead. 5/6
Battlegrowth GInstant Put a +1/+1 counter on target creature.
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