I enjoy seeing people playing colorless in EDH, and you have done some nice work here. Did a little playtesting and I could cast Kozilek pretty reliably by turn 6, but I wasn't able to get too many creatures out beforehand. I would recommend some cheaper artifact creatures such as Opaline Unicorn, Steel Wall, Alloy Myr, and Ugin's Construct to help you maintain board presence early game. Also, is there any reason that you are not running Eldrazi Mimic?

Eldrazi Mimic is in there just because it was in the first draft when it was eldrazi tribal. It has been removed from the final deck list but I just forgot to update that.

I can always use some good early game. I'll take those into mind. Love Ugin's Construct though. Overlooked that if you have no colored permanents then there is no draw back to it.