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
Aether Burst 1UInstant Return up to X target creatures to their owners' hands, where X is one plus the number of cards named Aether Burst in all graveyards as you cast this spell.
Realmbreaker, the Invasion Tree 3Legendary Artifact {2}, {T}: Target opponent mills three cards. Put a land card from their graveyard onto the battlefield tapped under your control. It gains "If this land would leave the battlefield, exile it instead of putting it anywhere else." {10}, {T}, Sacrifice Realmbreaker, the Invasion Tree: Search your library for any number of Praetor cards, put them onto the battlefield, then shuffle.
Archmage Ascension 2UEnchantment At the beginning of each end step, if you drew two or more cards this turn, you may put a quest counter on Archmage Ascension. As long as Archmage Ascension has six or more quest counters on it, if you would draw a card, you may instead search your library for a card, put that card into your hand, then shuffle.
Monk of the Open Hand WCreature — Elf Monk Flurry of Blows — Whenever you cast your second spell each turn, put a +1/+1 counter on Monk of the Open Hand. 1/1
Devil K. Nevil 2RLegendary Creature — Devil Performer Haste When Devil K. Nevil enters the battlefield, jump it over any number of creatures. If it clears those creatures, put that many +1/+1 counters on it. (You can see a jumping demonstration at DevilKNevil.com.) 2/1
Territory Forge 4RArtifact When Territory Forge enters the battlefield, if you cast it, exile target artifact or land. Territory Forge has all activated abilities of the exiled card.
Midnight Banshee 3BBBCreature — Spirit Wither (This deals damage to creatures in the form of -1/-1 counters.) At the beginning of your upkeep, put a -1/-1 counter on each nonblack creature. 5/5
Ravenous Slime 2GCreature — Ooze Ravenous Slime can't be blocked by creatures with power 2 or less. If a creature an opponent controls would die, instead exile it and put a number of +1/+1 counters equal to that creature's power on Ravenous Slime. 1/1
King Narfi's Betrayal 1UBEnchantment — Saga (As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I — Each player mills four cards. Then you may exile a creature or planeswalker card from each graveyard. II, III — Until end of turn, you may cast spells from among cards exiled with King Narfi's Betrayal, and you may spend mana as though it were mana of any color to cast those spells.
Vexing Beetle 4GCreature — Insect This spell can't be countered. Vexing Beetle gets +3/+3 as long as no opponent controls a creature. 3/3
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