Galactus, Devourer of Worlds

Indestructible
Whenever Galactus attacks, defending player
exiles the top 20 cards of their deck.
"No living thing dares ignore my call. For I am that
which has always been, since this Universe was
birthed from the ashes of the last. I am the hunger
that dooms worlds. I am he who is beyond such frail Concepts as good and evil. I am Galactus."