The Birth of Arthur
Arthur was conceived under very unusual conditions. His father Uther, persuaded Merlin to use dragons breath on him to turn him into Igraines husband. He desired Igraine so much that he struck a deal with Merlin that if there was a child born, he would get handed to Merlin, the wizard.
That night Igraines real husband Gorlois, rode off to defend the land from invaders and Uther rode in. Also that night Uther and Igraine had a baby and the young Arthur was born. He was handed to the druid and Merlin gave the young boy to Sir Ector who would raise the boy along with Ectors own son Sir Kay.
His childhood went uneventfully. Around age fifteen Ector took Kay and Arthur to a jousting tournament. When Arthur was asked to find Kay's sword, Arthur realized he didnt pack a sword. He found the sword in the rock and he was able pull it out. Arthur was pronounced King of Britain.