Worldgorger Dragon

Creature - Nightmare Dragon 7/7, 3RRR (6)
Flying, trample
When Worldgorger Dragon enters the battlefield, exile all other permanents you control.
When Worldgorger Dragon leaves the battlefield, return the exiled cards to the battlefield under their owners' control.¹
Illus. Wayne England

Gatherer Card Rulings [Nov 2009]

• 10/4/2004: It is possible for the Dragon to leave the battlefield before its "enters the battlefield" trigger resolves. If this happens, then the "leaves the battlefield" trigger will have nothing to return and the "enters the battlefield" trigger's effects will be irreversible.
• 8/1/2005: If an Aura is exiled this way, you can place it on any legal permanent when it returns. It doesn't have to go back to the same place. It can't be placed on a permanent that is entering the battlefield at the same time.

Format Legality	Legal in Vintage Banned in Legacy, Extended, Standard
Printings (1/6)	Judgment (Rare)