Lord Macduff, the Thane of Fife, is a legendary hero who plays a pivotal role in William Shakespeare's Macbeth. He suspects Macbeth of regicide and eventually kills him in the final act, saving Scotland from Macbeth's tyranny.
"Hail, Macbeth! I am Lord Macduff, Thane of Fife. I have come to warn you that I suspect you of regicide. If you do not step down from your throne, I will be forced to take action."