Assert Authority Tweet Brand New, 6 In stock $0.33 Details Artist: Greg Hildebrandt Card Number: 30/306 Card Text: 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. Card Type: Instant Color: Blue Cost: 5UU Finish: Regular Name: Assert Authority Rarity: U Set Name: Mirrodin