With other complementary artifact mana sources like Thran Dynamo and Grim Monolith, decks could count on being able to get the kind of mana you'd need to justify packing the cards that would let you use the mana from Metalworker to deliver the knockout blow, and their presence lets you turn that Metalworker mana into permanent giant amounts of mana rather than just a one shot deal
Pierre's play in Columbus was a little rough around the edges, but his deck buildone-third credited to future Resident Genius and PT winner in his own right Guillaume Wafo-Tapamade the tournament look like a basketball contest between LeBron James and an auditorium full of five-year-olds, with Pierre dominating even the matches he was supposed to lose
Well also add Urzas IncubatorUrzas Incubator, which got reprinted in the main MH3 set, but sadly not in this precon
Countermagic's strength is the ability to be a "universal" answer to almost any card as it is cast
Black and blue have no way to directly remove artifacts and enchantments and red can only do the former
Psemilla, Meletian Poet Hey, a bad Archon of Suns Grace is still an Archon of Suns Grace, and Psemilla, Meletian Poet fits the bill