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An unlimited artifact/mana/lifegain deck. Cast your artifacts down after you have your Myrsmiths and Leonin Elders out to create myr tokens and gain life for every myr token you bring down. Sacrifice myr tokens to generate double mana with your Krark-Clan Stokers, or sacrifice them with your Sage of Lat-Nam to allow you to draw cards as you need. Utilize the machinate cards to search for artifact creatures like Gold/Silver Myr to increase your available mana pool. Take advantage of the Relic Barriers to control your artifact creatures before their summoning sickness wears off and the Mirran Spys and Viziers of Tumbling Sands to untap your mana generating artifact creatures and non-artifact creatures, respectively.
Leonin Elders and Myrsmiths are an early game priority. Without these, the mechanic doesn't work. Start by playing artifact spells one at a time, maximizing your available mana pool each turn to generate multiple myr tokens. Once you can get either a Sage of Lat-Nam or Krark-Clan Stoker out, you'll have the ability to draw cards and generate a large pool of red mana that you can use to generate even more myr tokens, and the Vizier and Mirran Spy allow you to untap each myr you tapped for mana whenever a myr token enters the battlefield and then untap the Stokers to allow you to generate even more tokens. If things get rough, throw down a War Report and grab one life for each creature plus one for each artifact. What that means is each myr (token or not) counts for two life each time you play War Report. You'll have as many 1/1 blockers as you don't need for the other purposes, and with Magnetic Flux, you can give every single one of your myr tokens flying. With this as your final kill condition, you can mass swarm several hundred myr tokens, and send them against multiple players at once, overwhelming most decks that aren't built to handle fliers.
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