Assert Authority (Mirrodin #30)

Assert Authority {5}{U}{U}

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.

Illustrated by Greg Hildebrandt

Standard
Alchemy
Pioneer
Explorer
Modern
Historic
Legacy
Brawl
Vintage
Timeless
Commander
Pauper
Oathbreaker
Penny