Answer:
Many try but all fail. Then one day Arthur, who is attending his foster brother Sir Kay, is sent to find a sword to replace his brother's broken one. He comes upon the magical sword Excalibur in the stone and, not knowing the prophecy, drew it out. Thus, he is proclaimed the new king.
Think about the whole situation and maybe the hidden facts that arent been told to you. False propaganda is obviously being made for a purpose, if you figure out the purpose you can understand the real situation.
Basically, find a drawing or picture (with information) that helps your topic.
Metaphor
Hyperbole
Hope this helps!