Assert Authority (30) (Mirrodin)

Rarity:	U
#:	30
Creature Type or Sub Type:	Instant
Rules Text Contains:	Affinity for artifacts (This spell costs 1 less to play for each artifact you control.) Counter target spell. If it's countered this way, remove it from the game instead of putting it into its owner's graveyard.
Set:	Mirrodin
Number:	30