Coax from the Blind Eternities

Sorcery

You may reveal an Eldrazi card you own from outside the game or choose a face-up Eldrazi card you own in exile. Put that card into your hand.

At Nahiri's call, Emrakul traversed the vast emptiness between the planes and arrived on Innistrad.

2016-07-13 A card that is exiled face down has no characteristics. You can't choose it, even if you're allowed to look at it.
2016-07-13 An Eldrazi card is one with the subtype Eldrazi. Noncreature cards with devoid from the Battle for Zendikar block are Eldrazi-themed, but they are not Eldrazi cards.
2016-07-13 In a casual game, a card you choose from outside the game comes from your personal collection. In a tournament event, a card you choose from outside the game must come from your sideboard.

mtg.wtf