Blue artifact deck.
Mycosynth Lattice turns everything into artifacts and lets me use mana like it's mana of any color, so can play the green enchantment that gives all my creatures Trample.
Magnetic Flux gives all my artifact creatures Flying for a turn.
Myr Incubator lets me remove any number of artifacts from my library and take them out of play, and then put in 1/1 Myr tokens equal in number to the cards removed this way.
Coat of Arms gives all creatures +1/+1 for each other creature sharing a creature type with them. In other words, each Myr token gets +1/+1 for every other Myr. 50 Myr tokens, they're each a 50/50.
Evil, but not as bad as when I combo March of the Machines with that Mycosynth Lattice. Instakill any and every land that comes into play or is in play...and with my Myr manapumpers and Mycosynth Golem (gives all my artifact creatures affinity for Artifacts), I can still play pretty much everything.