Nightmare Incursion

Sorcery    (CMC:6)

Search target player's library for up to X cards, where X is the number of Swamps you control, and exile them. Then that player shuffles his or her library.

40 EVE • ENChuck Lukacs

™ & © 1993—2008 Wizards of the Coast

Legal in: Modern,Lorwyn-Shadowmoor Block,Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Classic,Singleton 100,Commander

Oracle Text (click to copy):

8/1/2008
The cards are exiled face up, so everyone can see what they are. (This is true of every effect that exiles cards, unless the effect specifically says it exiles those cards face down.)