Assert Authority 30/306 (Mirrodin) - Foil

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.

NM - $6.70
LP - $5.40
MP - $4.00
HP - $2.70
DMG - $1.40