Emrakul, Zendikar's End

Emrakul, Zendikar's End can't be countered or exiled.
When you cast Emrakul, destroy all lands. For each land destroyed this way, its controller puts a token basic land named Wastes into the battlefield. (It has {t}: Add {c} to your mana pool.)
Landfall - Whenever a land enters the battlefield under your control, you may destroy target land that isn't a Wastes.