Since its a sibling, and siblings tend to be in a person's close circle of people, informal speech is used.
<span>The supernatural event that happened in Morte D’Arthur was when the character Arthur was able to draw the sword called Excalibur from the stone while he’s still a boy. Excalibur is the legendary sword of King Arthur. Excalibur is also called Caliburn. This sword has magical powers.</span>
What quotes there is nothing there except the question
