Null Rod is devastating against this artifact-centric deck, shutting off Mox Opal, Lotus Petal, Agatha's Soul Cauldron, and Mishra's Bauble. Disruptor Flute can name Urza's Saga to shut off Construct creation, or name Emry or Goblin Welder to tax them and shut off their activated abilities. Ghost Quarter and Sinkhole are cut since their manabase isn't the primary vector of attack against a deck that goldfishes quickly with artifacts. Keep Wasteland to hit Urza's Saga before chapter III, and Orcish Bowmasters/Fatal Push to answer their early creatures.