Locations
We've seen plenty of takes on Eldrazi in Modern over the last couple of years. From the original colorless and 
builds that started it all to the 
and Bant builds that dominated Eldrazi winter, and even the Tron variants we see now, there are lots of ways to build Eldrazi decks. That said, you've definitely never seen one quite like this:
Red-Black Eldrazi - Modern | Tenshi, 5-0 Modern League
- Creatures (23)
- 1 Ulamog, the Ceaseless Hunger
- 2 Wasteland Strangler
- 4 Abundant Maw
- 4 Distended Mindbender
- 4 Eternal Scourge
- 4 Matter Reshaper
- 4 Thought-Knot Seer
- Instants (4)
- 2 Dismember
- 2 Spatial Contortion
- Enchantments (2)
- 2 Heartless Summoning
- Artifacts (6)
- 2 Chalice of the Void
- 4 Relic of Progenitus
- Lands (25)
- 1 Swamp
- 1 Wastes
- 1 Urborg, Tomb of Yawgmoth
- 3 Field of Ruin
- 3 Sanctum of Ugin
- 4 Blackcleave Cliffs
- 4 Cavern of Souls
- 4 Eldrazi Temple
- 4 Sulfurous Springs
- Sideboard (15)
- 2 By Force
- 2 Crumble to Dust
- 1 Dismember
- 1 Engineered Explosives
- 1 Grafdigger's Cage
- 2 Ingot Chewer
- 3 Kozilek's Return
- 1 Mountain
- 2 Shriekmaw
Eldrazi deck with an exciting Emerge engine. You've still got a pretty reasonable Eldrazi core of Matter Reshaper, Thought-Knot Seer, and Eternal Scourge. Scourge doesn't see play everywhere, but with Relic of Progenitus involved it becomes a recursive threat, blocker, or emerge fuel. Wasteland Strangler is another great choice once you've decided to play Relic of Progenitus.
The real fun of the deck comes when you combine these three-drop value creatures with Heartless Summoning, emerge threats, and Sanctum of Ugin. This gives you the ability to curve Relic of Progenitus into Heartless Summoning into Eternal Scourge. Then you can start Distended Mindbender-ing your opponents into submission. Sanctum of Ugin will allow you to get more copies of Distended Mindbender or Abundant Maw, and you can keep recasting Eternal Scourge out of exile as a blocker and pseudo ritual for your Emerge threats.
You even have some space for a limited amount of interaction, including Chalice of the Void, Dismember, and Spatial Contortion. Depending on what kinds of decks you expect to face, you could tweak these cards to include things like Thoughtseize or Fatal Push, as long as you can configure your mana effectively. There's a myriad of options to support this super interesting engine, and I can't wait to see what people can do with it.
