Eternus, The Destroyer

Indestructible, Deathtouch, Vigilance
Annihilator 3
Cosmic (When this creature enters the battlefield
or attacks, look at every hand, graveyard, and exile
zone. then you may cast any number of cards from
these areas without paying their mana costs.)
Whenever this permanent attacks, exile each
nonland permanent your opponent controls,
then exile two target lands.
"Nothing can escape me. I end lives,
planes, and even whole worlds!"