I have something pretty cool I've been working on that also has Kozilek at the helm, but I use this as a means to bring out a bunch of vehicles instead, and make a reference to Halo while I'm at it. The deck is: Halo.

I also have a bunch of 12-post inspired builds that also love big, colorless eldrazi. Balinor5 also happens to have some cool eldrazi-centric builds.

Can Diamond Lion even be used? You have to choose a color and the deck is colorless. And from the rulings that I searched, you can only choose a color that is within your deck colors and colorless isn't a color so I don't think your Diamond Lion would serve any purpose.

@Asunami yeah you can. while it's true that the 2 colorless in the casting cost have to be colorless, the other 8 can be paid with whatever color you want...