Eye of Ugin is a must if you're playing Eldrazi. Adding will give you utility as well as Crop Rotation , Primeval Titan , Green Sun's Zenith , etc.

Chalice of the Void is bonkers.

If you want to go a different route, Metalworker MUD is a similar deck that is colorless. You have many of the cards for it, although it doesn't run any Eldrazi...

I play Mono 12 Post with good results.

Ya, this is more of a gimmick deck for fun. Eye of Ugin lets the cat out of the bag that you're playing Eldrazi. Then people gun for you in multi player. I was thinking of putting one copy of each in the SB and include the other rare/uncommon Eldrazi, just so the whole family can play.

Glimmerpost . Combos with Cloudpost.

Ya, you're right. I should have glimmer post. Thanks.

While Eye of Ugin lets the cat out of the bag, so does Eldrazi Temple , which you're already running. I would also run at least one of each of the three Eldrazi Titans in the mainboard, as well as the Eye.

Oh ya, heh.

Eye of Ugin is probably a good idea since there are only 3 creatures in the deck. What's the average turn that you have 30 mana by?

Also I hate the be the one who brings it up; but casting 3 Emrakul, the Aeons Torn back to back doesn't net you three extra turns. Just one. It says take an extra turn after THIS one, so all three instances of the extra turn happen at once, fizzling two of them.

Still a good play though! Dropping multiple eldrazi on the same turn is a show stopper

+1 from me. nasty deck man. Eldrazi is just insane. Nice combinations that allow you to ramp out quickly. Looks good.

Why are there 3 copies of the Legendary Eldrazi in your sideboard? You can only cast 1 of each via Spawnsire of Ulamog or they start to destroy each other. 1 copy of each in the side is enough.

Multiple extra turn effects do net you multiple extra turns. Just check out the rules, or take my word for it since I play the deck on MTGO and would know. It works. But it is over kill, and it's purely for an over the top troll victory. It's fun.

The easiest way to do this imo is to use the heartbeat of spring combo deck shell and add 2 Spawnsire of Ulamog . Emrakul and all the other baddies in the side. Ramp up mana and unleash the horde.

http://mtgsalvation.gamepedia.com/Standard_Heartbeat_deck

just switch out a top and maga for 2x Spawnsire. Its actually fairly consistent I used to play it all the time on Magic Online.

Important tip: always mull any starting hand containing spawnsire.

having multiple copies of Kozilek, Butcher of Truth and Ulamog, the Infinite Gyre are a great idea, so you can blast away permanents and draw stupid amounts of cards

i'm 99% sure that the wording on the card only gives you one extra turn after this one. Emrakul, the Aeons Torn , Time Warp , Temporal Mastery ... WotC doesn't want folks to have a gazillion extra turns back to back, so they word it specifically to prevent that

500.7. Some effects can give a player extra turns. They do this by adding the turns directly after the current turn. If a player gets multiple extra turns or if multiple players get extra turns during a single turn, the extra turns are added one at a time. The most recently created turn will be taken first.

Sluts

Add Karakas , bounce Emrakul, recast, attack, recast Emrakul, attack, bounce... :-D

Haha! This deck really has no need for Karakas to win, but it adds a level of absurdity and another layer of over the top endless turns wins, I can appreciate that and stick it in the maybeboard for now. Thanks.

No prob. I run it in my 12 Post deck. It also hoses Show and Tell and Reanimate decks. I also run the Thespian's Stage + Dark Depths combo.

1 Eye of Ugin would probably be a big help if you don't draw a Staff of Domination or Spawnsire of Ulamog . But this is very cool. +1

Also, what's the point in running 3 of each Eldrazi in your sideboard if they're legendary? Couldn't you sideboard something like Wasteland for matchups where land destruction is relevant? I'm sure there's a better use for those slots.

I can't stop thinking about how funny it would be to Stifle your Spawnsire of Ulamog after you tapped out and did all your gimmicks to pay 30 mana LOL

Duffzord my brother has done that to me. Also Mana Short and Voidslime

awesome

+1, hilariously awesome deck concept!

Why not put in a play set of Training Grounds ? They'll make Spawnsire of Ulamog 's first ability cost 0 and summon an infinite amount of Eldrazi Tokens. THEN use his big ability.Just a suggestion. Didn't know if you had tried it.