Assert Authority

1 printing · from $0.35 · pictured: Mirrodin #30

€0.12

cheapest of 48 store offers · see all

market $0.35

Mana cost: {5}{U}{U}

Type: Instant

Commonly played as: Counterspell

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.

Artist: Greg Hildebrandt

Released: 2003-10-02

Market price

  • TCGplayer: $0.35
  • TCGplayer foil: $3.66
  • Cardmarket: €0.23
  • Cardmarket foil: €1.14
  • MTGO tix: 0.03
$3.70$0.24
234 days of daily prices for Assert Authority: $0.24 to $0.35
2026-01-252026-11-12
regular foil · 234 days tracked · $0.24 → $0.35 (+46%) · low $0.24 · high $3.70
Daily USD snapshots; a flat stretch is a day with no new price recorded.

Other languages

The same printing (Mirrodin #30) in 8 other languages.

Store prices

The 3 cheapest per condition and finish, in stock at the last check. Offers not re-confirmed within 60 days are not shown. Prices in different currencies are compared at the current exchange rate.

StoreConditionFinishPriceChecked
CardTraderHP · todayHPregular€0.12today
ManaPoolSP · todaySPregular$0.15today
CardTraderMP · todayMPregular€0.15today
ManaPoolMP · todayMPregular$0.19today
CardmarketNM · todayNMregular€0.18today
CardTraderSP · todaySPregular€0.19today
CardTraderDM · todayDMregular€0.22today
The Mystic StoreMP · todayMPregularCA$0.35today
ManaPoolHP · todayHPregular$0.25today
ManaPoolNM · todayNMregular$0.26today
The Mystic StoreSP · todaySPregularCA$0.40today
GameKeeperNM · todayNMregularCA$0.49today
ManaPoolDM · todayDMregular$0.35today
CardTraderDM · foil · todayDMfoil€0.44today
CardmarketNM · foil · todayNMfoil€1.14today
ManaPoolSP · foil · todaySPfoil$1.78today
ManaPoolNM · foil · todayNMfoil$1.80today
ManaPoolMP · foil · todayMPfoil$2.19today
Bazaar of MagicNM · foil · yesterdayNMfoil€2.00yesterday
CardTraderSP · foil · todaySPfoil€2.08today
First PlayerMP · foil · 2 days agoMPfoilCA$3.842 days ago
MTG MexicoHP · foil · 3 days agoHPfoil61.00 MXN3 days ago
ManaPoolHP · foil · todayHPfoil$3.30today
MTG MexicoMP · foil · 3 days agoMPfoil68.00 MXN3 days ago

Truncated: 24 further offers are available at a higher price in the same conditions, out of 48 in total.

Format legality

  • standard: not legal
  • pioneer: not legal
  • modern: legal
  • legacy: legal
  • vintage: legal
  • commander: legal
  • pauper: not legal
  • brawl: not legal

In Gestic collections

  • Held in 15 lists
  • Played in 2 decks

Decks that play this card

Browse all decks

All printings

Set#RarityUSD
Mirrodin#30 · uncommon30uncommon$0.35