Prophetic Prism and Metalspinner's Puzzleknot: Cheap cantripping artifacts that also help with improvise and, in the case of prism, can fix mana to cast tracker.
Contraband Kingpin: Great blocker that smooths out draws. Buys us good time for the dope late game. Also survives Yaheeni's Expertise.
Tireless Tracker: Sole reason for playing green. Trifecta of big threat, card advantage, and artifact producer. Amazing.
Tezzeret the Schemer: The protagonist of the deck. His major strength is ramping while staying relatively safe thanks to his massive starting loyalty. His ult may not seem sexy, but it once you have the emblem, every single artifact in your deck becomes a threat.
Herald of Anguish: Good payoff card that can win on it's own. Starts nuking your opponent's hand while turning useless prisms and maps into disfigures.
Noxious Gearhulk: Not much to say. Kill their best creature, have a hard-to-deal-with threat on the board.
Fatal Push, Yahenni's Expertise, Metallic Rebuke, and Grasp of Darkness: The deck needs interaction in order to deal with problem creatures, not to mention the new copy cat deck. In the case of Fatal Push, it is excellent with Tezzeret's +1 ability. Metallic Rebuke is consistently mana leak or better, and Grasp is just a solid, dependable removal spell.
