Thanos, the Inevitable

Inevitable {p/w}{p/u}{p/b}{p/r}{p/g} ({p/w}{p/u}{p/b}{p/r}{p/g}, Exile this
card from your hand: During your next turn, you
may cast this card from exile without paying its
mana cost and as though it had flash. If you do, it
can't be countered. Activate this ability only as a
sorcery.)
When Thanos, the Inevitable enters the
battlefield, each player exiles the top half of their
library and exile half of the other creatures on
the battlefield, rounded up.
"I am inevitable."