All-colorless cube, designed primarily for 2p Winston Drafts. Colored mana is only available via non-basic lands or other drafted sources, and will almost always cost you life, an extra land (via filtering), a creature, or some other price. Not that there are a ton of colored costs, but it's something to keep in mind.
Here are some of the major subthemes that can be assembled:
+1/+1 Counters
Build 'em up, pass 'em around.
Attack of the Myr
Go get 'em, little guys!
Sacrifice
Mmmm... crunchy.
Token Swarm
Spawns, Scions, Myr, Gnomes, Soldiers... beat your opponent through sheer numbers.
Ramp
With this many Eldrazi and other giant constructs running around, you're gonna need more than just lands.
Lands
Speaking of Lands, many of them aren't sitting by idly either!
Equipment/Vehicles
Not really a synergy-driven strategy, but there are definitely ways to make your smaller creatures more threatening.
Removing blink effects (that aren't Eldrazi Displacer), swapping around a few vehicles, and adding a few more effects that look like removal if you squint.
Also realized that Conduit of Ruin didn't have a ton of targets, so turning that into a more interesting Eldrazi in Anticausal Vestige.