Blue-Green Eldrazi Emerge (Flash idea) (Standard)

General goal is to put out mostly human low-cost creatures for the first few turns, that benefit the player from death, such as Primal Druid and Exultant Cultist. Humans come in handy during the early-game against human decks, since there are many "Target non-human" strategies. By turn 4, Wretched Griff is ready to come out with draw power, emerging onto Primal Druid to bring more mana or Foul Emissary to bring an Eldrazi 3/2 creature token to the battlefield. From there, Emerge continues to grow and overwhelm the opponent with Decimator of Provinces. Void Grafter protects larger creatures by flashing in to give them hexproof, while also serving as a good card to emerge on. Conduit of Ruin, Oblivion Sower, and Kiora, Master of the Depths function to make it easier to cast creatures every turn while keeping extra mana for instant spells during the opponent's turn. Emrakul's Evangel serves to kill off unnecessary creatures to replace them with tokens and activate their death effects.

Future changes:
Move two Elder Deep-Fiends into the deck, and put Mockery of Nature and Vexing Scuttler into the sideboard. Drownyard Behemoth also would function well in this deck, due to being able to flash in - could replace Lashweed Lurker, which would move to the sideboard. Replace an Exultant Cultist and Wild-Field Scarecrow with two more Primal Druids to mana ramp faster. Move Springsage Ritual into the sideboard to put one more Unsubstantiate.