Creature and planeswalker spells you cast have affinity for artifacts. (They cost {1} less to cast for each artifact you control.)+2: Tezzeret, Master of the Bridge deals X damage to each opponent, where X is the number of artifacts you control. You gain X life.−3: Return target artifact card from your graveyard to your hand.−8: Exile the top ten cards of your library. Put all artifact cards from among them onto the battlefield.