Colorless Eldrazi
A Legacy deck, by _goblinlackey
2nd place at a tournament in Magic Online on 2020-07-16

Maindeck:

Artifacts
4 Chalice of the Void

Artifact Creatures
2 Walking Ballista

Creatures
4 Eldrazi Mimic
4 Elvish Spirit Guide
4 Endless One
4 Matter Reshaper
4 Reality Smasher
4 Thought-Knot Seer

Instants
2 Dismember
3 Once Upon a Time

Legendary Artifacts
1 Umezawa's Jitte

Lands
4 Ancient Tomb
4 Cavern of Souls
2 City of Traitors
4 Eldrazi Temple
2 Mishra's Factory
4 Wasteland

Legendary Lands
3 Eye of Ugin
1 Urborg, Tomb of Yawgmoth

Sideboard:
2 Ratchet Bomb
1 Sorcerous Spyglass
4 Thorn of Amethyst
1 Phyrexian Revoker
4 Leyline of the Void
1 Dismember
2 Warping Wail