Magic: the Gathering - Assert Authority - Mirrodin

Magic: the Gathering is a collectible card game created by Richard Garfield. In Magic, you play the role of a planeswalker who fights other planeswalkers for glory, knowledge, and conquest. Your deck of cards represents all the weapons in your arsenal. It contains the spells you know and the creatures you can summon to fight for you.

Card Name: Assert Authority

Cost: 5UU

Color: Blue

Card Type: Instant

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.