Whoso pulleth out this sword of this stone and anvil, is rightwise king born of all England.
This prophecy is what opens the door for Arthur to claim his birthright of the crown. Arthur pulls the sword from the stone with the intention of giving it to his foster brother Kay. He has no idea of its implication, or of his fate. This acts lays the foundation of Arthur’s chief characteristic – he is first a man, and then a King, which seemingly separates him from the other lesser kings of England. The pulling of the sword from the stone makes Arthur High King, although he already has a legitimate claim to the throne. A case of mistaken identity, one of the reoccurring motifs throughout the text, prompts the Kings of the North to declare war on Arthur. They claim he is not of noble birth, and is too young to rule. Arthur, with the aid of Merlin, conquers the Kings of the North, thus proving he is worthy of his crown, by birth and by prophecy.