Ok, so this is my description.
I decided that, because white isn't particularly extraordinary for the eldrazi, and because black is the colour that I always play recently, I'll get out of that rut by making a G/R/U deck. Really, it's Red mainly, with Green as an aside, and a small splash of blue.
The interesting green cards include:
Awakening Zone: gives me a new eldrazi spawn token each and every single turn.
Ancient Stirrings: allows me to scour through the top 5 cards of my deck for either a fun and interesting land (I have many) or an eldrazi. Always helpful.
Broodwarden: Allows me to make my mass of Eldrazi Spawn tokens actually somewhat useful.
Primeval Titan: Of all of my interesting land, I can bring out any of them tapped with
Primeval Titan. This is always a helpful tactic, and that's why the card is worth $20.
Sakura-Tribe Scout: Tapping for more land every single turn? Awesome.
Oracle of Mul Daya: Simply being able to play more land each and every single turn? Even more awesome!
Some of the rediculous Red cards include:
Rapacious One: A red card with trample? Cool. Having all of the damage dealt by it turn into Eldrazi Spawn Tokens? Nuts.Aside from this, there is always the combo for a turn 3 Hand of Emrakul:
Turn 1: Mountain]/Other land
Why bother with the blue splash?
Training Grounds: This is only really helpful with one card; Spawnsire of Ulamog; in which case if I have out 2 training grounds, I have infinite mana. How? Spawnsire of Ulamog's ability for 4 colorless mana brings out 2 eldrazi spawns. With 2 Training Grounds, this costs 1 mana. 1 Mana for 2 Mana causes an infinite amount of mana as I don't have to tap the Spawnsire of Ulamog.
Phantasmal Image: Mana cost 2 to copy anything; why not?
I've always liked infinite mana combos that require you to have a 10 cmc creature in play to make it work.
Why not just play omniscience?