Macduff, driven by grief, guilt, and a desire for justice, confronts Macbeth during the climactic battle in Dunsinane Castle. Macbeth, despite being aware of the prophecies that foresee his ultimate fate, remains resolute and faces Macduff with determination.
As they engage in combat, Macduff reveals that he was not born in the traditional manner but rather "from his mother's womb untimely ripped," thus fulfilling one of the prophecies that Macbeth feared - to be defeated only by a man not born of woman.
Realizing the implications of Macduff's revelation, Macbeth becomes filled with fear and despair, exclaiming, "Accursed be that tongue that tells me so, for it hath cow'd my better part of man!"
Despite his shaken resolve, Macbeth continues the fight, but he is ultimately defeated by Macduff. With a powerful strike, Macduff beheads Macbeth, symbolizing the end of his tyrannical reign and the restoration of rightful order in Scotland.
Macduff emerges as the victorious hero, fulfilling the prophecies and liberating Scotland from Macbeth's oppressive rule. His victory represents a triumph of justice and the ultimate defeat of evil.