Cheapest priced copy (Eventide): $1.49 at Card Kingdom, near mint, their price list as of .
Nightmare Incursion 
Sorcery · Rare · Eventide · #40
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.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $1.49 to $15.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Eventide | 40 | Rare | $1.49 | $15.99 |
One ruling from Wizards of the Coast
- 1 August 2008The 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.)