My Father Is King Arthur

(DND + Celtic mythology + planar war + Roman mythology) “Question: How do you get a goddess to fall in love with you?” “Easy! Just survive a thousand attempts by her to kill you, and she’ll naturally fall in love with you!” The world calls me the Son of the Dragon, Mordred of the Knights of the Round Table. I am the blood of King Arthur, the Dragon’s Son of Britain. But I have long since shattered the fate of death. Why can’t I become the King of Camelot, or even the Augustus of Britain? (DND + pseudo-DND, with a few original elements, incorporating the Arthurian legends. In this setting, Rome, the Norse World Tree, and Britain are separate planes, not part of the same world. Rome is the main plane.)