Xathos, Hedron Salvager

When Xathos, Hedron Salvager enters the battlefield, exile up to 3 target lands.
Indestructible, Annihilator 3, Cannot be countered.
Whenever a card is exiled from play or from libraries, you may put a 0/2 hedron creature token with flying onto the battlefield.
It uses any Hedrons it finds to protect itself.