You have 2x True Convictions, so you'll hafta remove one of them and find something else to put in it's place.
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This is really nice, but I feel like you would see more success with it if you took out the Predatory Sliver's and then put in 3 more Belbe's Portals, as having 4 would allow you to draw into one almost every game -- only having one puts you at risk of not running into it at all, especially if it's the best card in the deck because it can get any creature out for ~3 mana.
Why not include other Eldrazi Cards? It seems counter intuitive to call the Deck an Eldrazi Deck when you include only one kind of Eldrazi, :|.
As much as I like this deck, I'm disappointed that it only has 4 actual Eldrazi cards in it -- any reason why you didn't include any other harder hitting, more common Eldrazi Cards other than the biggest hitters?