Straight Outta Compton

Metallic mimic is a fantastic card for this build, especially with bloodsoaked champion (comes back as a 3/2 battering ram every turn).

Yahenni's Expertise is no good in here. If you get in a position where you have to nuke, you've already lost (this deck swarms and basically nothing else).

I'm also not a big fan of running 3 duresses, as 3 copies of an anti-nuke/removal aren't going to be effective, and you aren't going to see many opening hands with one (which is where you really want to see them). You could either give a higher saturation of 1 drop discards (throw in inquisition of kozilek and kick em up to at least 7 copies), or you could take em out entirely, roll the dice on your speed vs opponent's removal, and swap in some field interaction like fatal push (etc) to pull out the blockers that buy time. I would highly recommend 4 copies of fatal push, as you really want to pull opponent's early critters off the board as fast as possible so you can steal turns with damage.

Mutavault is perfect for this too, as are some fetch lands (polluted delta, etc) to thin the deck out so you don't topdeck useless lands once you hit your operative curve (which is very small).

Xathrid Necromancer's party hard! :D