The owner of this deck hasn't added a sideboard, they probably should...
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If you want to stay within the modern-legality, you will have to remove "Seat of the Synod"
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My local group plays legacy, however, i appreciate the tip!
I would nevertheless do some things here: Change from "Font of Mythos" to "Howling Mine". It comes earlier, and with some help, e.g. from "Clock of Omen" or "Icy Manipulator", only you benefit from it. I would also try to raise the number of "Etched Champion" up to 4, it's one of your best beaters, and "Master of Etherium" also up to 4, at last he is a lord and pushes all your artifact creatures. If you feel that you're having to much mana, I would also remove either "Palladium Myr" or "Vedalken Engineer" "Master Transmuter" is nice, but in my oppinion, to benefit from it, you need something big, like e.g. "Akroma's Memorial", "Colossus of Akros", "Darksteel Forge", "Elbrus, the Binding Blade", "Blightsteel Colossus", and so on