When Realm Razer enters, exile all lands.
When Realm Razer leaves the battlefield, return the exiled cards to the battlefield tapped under their owners' control.
When Realm Razer comes into play, remove all lands from the game.
When Realm Razer leaves play, return the removed cards to play tapped under their owners' control.
The behemoth roared, and the world was blasted free of empires and tyrants.