MonoR Daretti / Scrap Mastery Artifacts (Oathbreaker)

Get out Daretti, Scrap Savant as fast as possible and use it to draw trough your deck and fill up the graveyard with big artifacts like Wurmcoil Engine, Myr Battlesphere or Staff of Nin. Then use one of the artifact reanimators like Goblin Welder, Trash for Treasure or Scrap Mastery to beat your opponents with heavy stuff. Try to fire of the Commander's Ultimate as fast as possible, to get the Emblem. With this on board, it gets very hard for your opponents to win the game anymore - especially with an Nevinyrral's Disk, an Oblivion Stone or a Mindslaver on your side. (the last = instant win)

Of course you can also use Darreti's second ability to reanimate artifact stuff, but you should always go for the Ultimate ability, if possible. Be sure to be able to protect Daretti with cheap blockers like Myr Retriever, Junk Diver or Guardian Idol, Mass Removal like Chain Reaction, Blasphemous Act or Nevinyrral's Disk and Utility Lands like Mishra's Factory, Blast Zone or Blighted Gorge.

This decklist contains 40 lands to consistently ensure one landdrop per turn because of the obviously heavy mana requirements. It is not really possible to flood while having Daretti, Scrap Savant on the board because of it's first ability. (Just discard redundant lands.) Seismic Assault is in the deck for the same reason. Also, by controling a Crucible of Worlds, it is possible to get back the discarded or sacrificed lands. This adds another win condition to the deck in combination with lands like Tectonic Edge. (or even Wasteland and Strip Mine...?)

Note: The second ability of Karn, the Great Creator gives you the possibility to get a sacrificed Ugin's Nexus back from exile for multiple times.