Affinity for artifacts (This spell costs 1 less to play for each artifact you control.) Counter target spell. If that spell is countered this way, remove it from the game instead of putting it into its owner's graveyard.
Color: Blue
Rarity: U
Cost: 5UU
Card Type: Instant
Artist: Greg Hildebrandt
Name: Assert Authority
Finish: Regular
Card Number: 30/306
Set Name: Mirrodin
Affinity for artifacts (This spell costs 1 less to play for each artifact you control.) Counter target spell. If that spell is countered this way, remove it from the game instead of putting it into its owner's graveyard.
