A budget modern affinity deck.
The general strategy is to get out cheap, evasive artifacts like Ornithopter, Signal Pest, and Vault Skirge and get through with a lot of damage with the help of Cranial Plating and Ensoul Artifact. Etched Champion, while fairly expensive, is perfect for the deck, as it can get in for a lot of damage in most match ups, and is therefore a fantastic target for Cranial Plating to finish a game on turn 4.
Frogmite and Memnite are less vital to the deck than other creatures, but are good value, and help the deck stay aggressive.
If I can't find Cranial Plating, Ensoul Artifact, or Master of Etherium, then Battle Cry on Signal Pest should be enough to get a win depending on the game. Welding Jar provides some fuel for affinity/metalcraft and Springleaf Drum helps me cast my 3 drops if I don't draw a lot of land.
Fabricate lets me tutor for an artifact, preferably Cranial Plating or Master of the Etherium at the point in the game that I can cast it, and Thoughtcast is very easy to cast for card advantage.
I've included a single Vapor Snag in the main board to deal with any problems on the battlefield before I make a (hopefully) lethal attack. If this ends up being more relevant, I can board in more Vapor Snags, some Stoic Rebuttals, or a Remand as appropriate.
The sideboard is pretty flexible, and I'll adjust that as I become familiar with my local meta.
