Macbeth approaches the witches to learn how to make his kingship secure. In response they summon for him three apparitions: an armed head, a bloody child, and finally a child crowned, with a tree in his hand. These apparitions instruct Macbeth to beware Macduff but reassure him that no man born of woman can harm him and that he will not be overthrown until Birnam Wood moves to Dunsinane. Macbeth is greatly reassured, but his confidence in the future is shaken when the witches show him a line of kings all in the image of Banquo. After the witches disappear, Macbeth discovers that Macduff has fled to England and decides to kill Macduff’s family immediately.