Surveil Eldrazi Reanimator (Modern)

Eldrazis:

• It That Betrays: the best eldrazi in the deck, the only reason i didn't put 4 is because i only own 2 and now they are pretty expensive.
• Pathrazer of Ulamog: the extra permanent you can destroy with annihilator 3 makes it the second best eldrazi in the deck.
• Artisan of Kozilek: just a good stated annihilator eldrazi, in long games you may be able to cast it and return another big eldrazi to the battlefield.

Surveil:

• Discovery // Dispersal: good cycling with Discovery and an alternate control option (not really used) with Dispersal.
• Thought Erasure: good disruption card which helps cycling and against control.
• Whisper Agent: just a defensive body with surveil, flash helps against aggro.

Reanimation:

• Persist: only 2-cost reanimation tool in Modern, makes it able to summon an eldrazi between turns 2 and 3(really key for competitive).
• Zombify: slower than Persist but still is faster than most reanimation tools in the format.

Others:

• Salvage Drone: used for cycling, always try to discard an eldrazi (but not another Salvage Drone ;) )
• Bone Shards: early removal for aggro, synergy with Salvage Drone and good for discarding the big stuff)
• Cast Down: one of the best budget removal spells in the format.

This deck does not suffer that much by doing mulligan, as you always have the possibility of starting by discarding an eldrazi with Salvage Drone/Bone Shards and Persist combo, having an eldrazi by turns 2 and 3.
Notice that this deck wasn't really focused on competitive play, this is a deck i've made to play against my friends and have fun with my favorite tribe in the game: Eldrazis.