Okay, so I'm cutting this down in chunks. I'm starting with the artifacts, Multicolor cards, and fixing that don't make the cut.

The Snow duals, while fetchable, are too much fixing for this cube, and I like the other lands aesthetically more.

The 3-color cards are out on account of being unpickable in draft and the artifact Runed Servitor is out, as it outclasses an existing, more type-enforcing card in Jousting Dummy, and Blackblade Reforged is too expensive to really see play.