를 칠

will hit, strike, or attack [something]

→ 를
phrase Uncommon #5,413
will hit, strike, or attack [something] 를 marks the object of the verb. 칠 is the future attributive form of 치다, meaning “to hit,” “to strike,” or, in some contexts, “to attack.” The term is a grammatical sequence rather than a standalone expression.
KO: 사우론은 미나스 티리스를 칠 거야.
EN: Sauron will attack Minas Tirith.

기타를 칠 줄 알아요.

I can play the guitar.

무선 전보를 칠 거 다

I’m going to send a wireless telegram soon.

— 특전 U보트 (1981)