Endless Horizons

Enchantment, 3W (4)
When Endless Horizons enters the battlefield, search your library for any number of Plains cards and exile them. Then shuffle your library.

At the beginning of your upkeep, you may put a card you own exiled with Endless Horizons into your hand.¹
Illus. Joshua Hagler

Gatherer Card Rulings [Nov 2009]

• 8/1/2008: If Endless Horizons leaves the battlefield, the remaining Plains cards stay exiled. If Endless Horizons returns to the battlefield, it's a new object with no relation to its previous existence. The previously exiled Plains cards will still stay exiled.
• 8/1/2008: If a different player gains control of Endless Horizons, its ability will trigger at the beginning of that player's upkeep, but it won't do anything when it resolves.

Format Legality	Legal in Vintage, Legacy, Extended, MTGO Classic Banned in Standard
Printings (1/9)	Eventide (Rare)