넷을

four

→ 넷
phrase Rare #32,066
four 넷 means “four,” and 을 marks it as the object of the verb.
KO: 사과 넷을 샀어요.
EN: I bought four apples.

넷을 모두 이겨야 하니

Because you have to beat all four of them.

— 무인 곽원갑 (2006)