Assert Authority
~$0.32 low · ~$3.70 high
Blue. Instant
Mirrodin #30 · Illustrated by Greg Hildebrandt
Mirrodin #30 · Illustrated by Greg HildebrandtWhat is Assert Authority worth?
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TCGplayer market prices in USD, updated October 14, 2026. Each price is for one printing and one finish.
Oracle text
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.
Format legality
The only printing of Assert Authority
| Printing | Rarity | Non-foil | Foil | Cardmarket (EUR) | My collection |
|---|---|---|---|---|---|
 Mirrodin mrd #30· 2003uncommon· Cardmarket €0.20 · €1.07 foil | uncommon | $0.32 | $3.70 | €0.20€1.07 foil |
Prices are TCGplayer market prices in USD for each printing and finish, via Scryfall. They are a guide, not an appraisal.
Where to buy Assert Authority
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Card details
- First printed
- 2003
- Printings
- 1
- Mana value
- 7
- EDHREC rank
- #12,349 on EDHREC (Commander popularity)
- Keywords
- Affinity
- Artist
- Greg Hildebrandt
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