Warhammer 40,000 Commander decks release October 7 and will be available at your local game store, online through Amazon, and everywhere else Magic is sold
Ragost, Deft Gastronaut Ragost, Deft Gastronaut is a 2-drop Boros colored Bear-sized Lobster that turns all of our artifacts into Food
Danny's got you covered
5 Shadow of the Enemy Yes, Shadow of the Enemy requires a lot of mana to make work, but there are plenty of ways to get a lot of mana even in Tales of Middle-earth (Smaug would like to give you 14 treasure tokens, just as an example)
There are plenty of artifact-centric alternate wincons like Hellkite Tyrant and Mechanized Production, but this cards much cheaper, takes opponents out directly, and has the alternate Mirrodin mode when you just need to build up your board