A Myr Token engine deck that uses Myr Token generation to reach endgame quickly. Could probably use a Myrsmith or two. Makes use of infinite mana generation with two myr galvanizers and one or two mana producing myr, with an army of tokens and Myr Battlesphere as the endgame goal. Myr Superion and Enforcer are there in case you feel the need to have cheap cards with higher power and toughness, though they shouldn't be necessary. Also I don't know how to use sideboards so whatever.
If your want the deck to be Modern legal, remove artifact lands and replace with basic lands.
Usage:
Use mana producing myr for mana ramp, and then use that to get out larger cards like Myr Matrix, Myr Turbine, and Myr Incubator. Using the 2x Myr Galvanizer + 2 mana from mana producing myr, you can generate infinite mana and create infinite tokens with Myr Matrix or Myr Propagator. Use Myr Turbine to get out Myr Battlesphere, and attack once tapping all myr to end the game. If you haven't gotten the Myr Galvanizer combo, Myr Incubator works well for getting a token army by removing all lands from the game.
Optimal game:
Hand - 3 lands, 3 mana producing myr, one Myr Galvanizer
1 - Drop a land. 1 mana at this point
2 - Drop a land. Play silver/gold/copper/leaden/iron myr(mana myr). 3 mana at this point
3 - Drop a land. play palladium myr or 2 mana myr. 6 mana at this point
4 - Play Myr Galvanizer, and have minimum 8 up to infinite mana next turn depending on drawn cards.
5 - Go from there to reach endgame with some combination of Myr Turbine, Matrix, Incubator, and Battlesphere
Feel free to leave any suggestions that you have in the comments!!