In the play Macbeth, supernatural events would occur throughout it to cause dramatic events. Each time an event occurred he was given an opportunity to use it to his advantage. There were three witches who would tell him what will happen in the near future. He also encounters a floating dagger, used for the murder of King Duncan, a ghost of Banquo who he had three men murder as well, and three apparitions. The first apparition is an armed head that warns Macbeth to "Beware Macduff." The second apparition is a bloody child who tells Macbeth that no man born of woman can hurt him. The third apparition is a child holding a tree branch. He tells Macbeth that he won't be defeated until the wood's come to Dunsinane Hill.
The first use of the supernatural is at the beginning of the play, when the three witches tell Macbeth's future. This is a clue as to how the future will unfold for Macbeth. One of the witches tells Macbeth that he will win the battle, and when he does, this is when he believes the three witches are telling the truth about his future. After a while the witches come back again and tell him that he will be king, either by working his way to it, or by murdering King Duncan. This is where he starts to become a tyrant, and taking in to consideration to murder the king. It is Macbeth's conscience talking when he sees the floating dagger and the ghost of Banquo, and has a constant worry of being discovered.