Assert Authority
Instant
MRD· Mirrodin· #30· uncommon
Affinity for artifacts (This spell costs 
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.
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.Regular
$0.25
Foil
$2.91
EDH Insights
Synergies, top commanders, and recommendations from EDHREC.
Top Commanders
Commanders that run this card most
Ovika, Enigma Goliath12% · 1.3k
Urtet, Remnant of Memnarch2% · 274
Mendicant Core, Guidelight2% · 272
Urza, Chief Artificer1% · 246
Breya, Etherium Shaper1% · 195
Urza, Lord High Artificer1% · 190
Emry, Lurker of the Loch2% · 138
Shorikai, Genesis Engine1% · 123
Golbez, Crystal Collector1% · 120
Sai, Master Thopterist4% · 108
Memnarch4% · 91
Aloy, Savior of Meridian1% · 71
Played Alongside
Top cards in decks running this one
Game Changers
High-impact picks for these decks
By Type
Most played by card type
Creatures
Instants
Sorceries
Utility Artifacts
Enchantments
Battles
Planeswalkers
Utility Lands
Mana Artifacts
Format Legality
standardN/A
pioneerN/A
modernlegal
legacylegal
vintagelegal
commanderlegal
pauperN/A
brawlN/A