Merlin, which is near major characters in the story that this is because he is a sorcerer who were adept in the 90s, and also directs them to King Arthur, too.
Merlin, which itself is a major character in the story is told, because he is a wizard that versatility in that era, and also a guide of things to King Arthur, too.
The Merlin is important character in this story to tell, because he is the most talented wizard power in the era, and is also the guide things to the war.