Individual Cards · Mirrodin
Assert Authority 30/306 Mirrodin
Uncommon30/306·Released Oct 2003
Assert Authority is a blue uncommon instant from the Mirrodin set (MRD) released in 2003. It allows you to gain control of target spell, making it a powerful countermagic tool. This card is a must-have for blue control decks and is popular among MTG collectors.✦ AI summary
Assert AuthorityMirrodinMTG UncommonBlue InstantMagic: The Gathering
How much is Assert Authority 30/306 Mirrodin worth?
As of Aug 9, 2026, the market median price of Assert Authority 30/306 Mirrodin is $2.00 on eBay.
Market median$2.00
Snapshots1
Data updated Aug 9, 2026 · source: live eBay listings, aggregated by TCGKami
Live Listings
No listings found.
