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
Sturdy Hatchling 3G/UCreature — Elemental Sturdy Hatchling enters the battlefield with four -1/-1 counters on it. {G/U}: Sturdy Hatchling gains shroud until end of turn. (It can't be the target of spells or abilities.) Whenever you cast a green spell, remove a -1/-1 counter from Sturdy Hatchling. Whenever you cast a blue spell, remove a -1/-1 counter from Sturdy Hatchling. 6/6
Dauntless Unity 1WInstant Kicker {1}{W} (You may pay an additional {1}{W} as you cast this spell.) Creatures you control get +1/+1 until end of turn. If this spell was kicked, those creatures get +2/+1 until end of turn instead.
Starfield Mystic 1WCreature — Human Cleric Enchantment spells you cast cost {1} less to cast. Whenever an enchantment you control is put into a graveyard from the battlefield, put a +1/+1 counter on Starfield Mystic. 2/2
Siege Veteran 2WCreature — Human Soldier At the beginning of combat on your turn, put a +1/+1 counter on target creature you control. Whenever another nontoken Soldier you control dies, create a 1/1 colorless Soldier artifact creature token. 2/2
Fiery Impulse RInstant Fiery Impulse deals 2 damage to target creature. Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, Fiery Impulse deals 3 damage instead.
Helm of Obedience 4Artifact {X}, {T}: Target opponent mills a card, then repeats this process until a creature card or X cards have been put into their graveyard this way, whichever comes first. If one or more creature cards were put into that graveyard this way, sacrifice Helm of Obedience and put one of them onto the battlefield under your control. X can't be 0.
Sphere of Annihilation XBArtifact Sphere of Annihilation enters the battlefield with X void counters on it. At the beginning of your upkeep, exile Sphere of Annihilation, all creatures and planeswalkers with mana value less than or equal to the number of void counters on it, and all creature and planeswalker cards in graveyards with mana value less than or equal to the number of void counters on it.
Bounty Board 3Artifact {T}: Add one mana of any color. {1}, {T}: Put a bounty counter on target creature. Activate only as a sorcery. Whenever a creature with a bounty counter on it dies, each of its controller's opponents draws a card and gains 2 life.
Haazda Vigilante 4WCreature — Giant Soldier Whenever Haazda Vigilante enters the battlefield or attacks, put a +1/+1 counter on target creature you control with power 2 or less. 4/4
Mathas, Fiend Seeker RWBLegendary Creature — Vampire Menace At the beginning of your end step, put a bounty counter on target creature an opponent controls. For as long as that creature has a bounty counter on it, it has "When this creature dies, each opponent draws a card and gains 2 life." 3/3
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