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
Sigil of Myrkul 2BEnchantment At the beginning of combat on your turn, mill a card. When you do, if there are four or more creature cards in your graveyard, put a +1/+1 counter on target creature you control and it gains deathtouch until end of turn. (To mill a card, put the top card of your library into your graveyard.)
Brilliant Halo 1WEnchantment — Aura Enchant creature Enchanted creature gets +1/+2. When Brilliant Halo is put into a graveyard from the battlefield, return Brilliant Halo to its owner's hand.
Processor Assault 1RSorcery Devoid (This card has no color.) As an additional cost to cast this spell, put a card an opponent owns from exile into that player's graveyard. Processor Assault deals 5 damage to target creature.
Red Elemental Blast RInstant Choose one — • Counter target blue spell. • Destroy target blue permanent.
Savior of Ollenbock 1WWCreature — Human Soldier Training (Whenever this creature attacks with another creature with greater power, put a +1/+1 counter on this creature.) Whenever Savior of Ollenbock trains, exile up to one other target creature from the battlefield or creature card from a graveyard. When Savior of Ollenbock leaves the battlefield, put the exiled cards onto the battlefield under their owners' control. 1/2
Flay Essence 1BBSorcery Exile target creature or planeswalker. You gain life equal to the number of counters on it.
Serum Sovereign 4UCreature — Phyrexian Sphinx Flying Whenever you cast a noncreature spell, put an oil counter on Serum Sovereign. {U}, Remove an oil counter from Serum Sovereign: Draw a card, then scry 2. 4/4
Kenrith, the Returned King 4WLegendary Creature — Human Noble {R}: All creatures gain trample and haste until end of turn. {1}{G}: Put a +1/+1 counter on target creature. {2}{W}: Target player gains 5 life. {3}{U}: Target player draws a card. {4}{B}: Put target creature card from a graveyard onto the battlefield under its owner's control. 5/5
Thrull Parasite BCreature — Thrull Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.) {T}, Pay 2 life: Remove a counter from target nonland permanent. 1/1
Pugnacious Hammerskull 2GCreature — Dinosaur Whenever Pugnacious Hammerskull attacks while you don't control another Dinosaur, put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.) 6/6
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