IS THIS AN ERROR!? Arthur says "All I know is that both of my parents died of magic..." WHY DOES HE THINK IGRAINE DIED OF MAGIC, IN SINS OF THE FATHER ARTHUR BELIEVED THAT MORGAUSE WAS MAKING AN ILLUSION OF HER MOTHER.

PLOTHOLE
and not the only one ;)

Correction: Arthur had been raised kwa Uther knowing that Magic was bad, and Uther had used his mother's death as a prime example, but never explained how she was killed. In 'The Sins of the Father' Arthur believed that Morgause made up the version that it was Uther that had an impact of his mother's death via magic. So yes, he does know she was killed kwa magic. This is vaguly brough up in a number of series 1 and 2 episodes.

Well Ygraine couldn't have a child so Uther asked for Nimueh's help. Nimueh used magic to help Ygraine conceive Arthur but she died during Arthur's birth. That's why magic was blamed for her death.

Apparently, Arthur's mother couldn't produce an heir for the throne. Uthur, desperate for a son, went to Nimue for help. But there was a price. To crate a life, a life must be taken in exchange. Uthur knew this and was even warned but still he accepted. 9 months later, Arthur was born. But on the same day, his mother died. A life for a life. Uthur blamed Nimue for the death of his wife and has been persecuting magic usesers ever sense

Ya I was curious about that too, I also wonder why Uther never told him the truth, I mean he was dying, why not?