The Searcher

Devoid, Trample.
Whenever The Searcher deals damage to an
opponent, name a card. Search their deck for up
to 4 copies of the chosen card and exile them.
Then, if an opponent owns 4 or more nonland
cards with the same name in exile, they lose the
game.
"The hunted never live to see their plight. The gods
won't either."