Well, no one but one of the MTGSalvation posters.
Take a look at part of the deck sheet for Tezzeret's side of the deck. (Picture from this MTGSalvation post):
See it yet?
Look 4 cards down at Silver Myr.
Now look at what sets the sheet says it's from.
Yeah buddy! A Scars of Mirrodin preview!
It looks like we'll be getting the "Myr Moxen" back from Mirrodin.
Say hello to him and his little friends!
Because they're reprints in a new set, they'll probably have new artwork. It'll be fun to see what they do with the Myr in Scars of Mirrodin, AKA "Mirrans vs. Phyrexia".