My Knights of the Round Table

"I used to think I was just an ordinary person."

"Then one day, a beautiful woman appeared behind me and told me to pull out that damn sword."

"That's when I suddenly realized something was off."

"Still, it shouldn't be a big deal. I've read The Death of King Arthur, so I'm practically invincible here. As long as I don't father Mordred, marry Guinevere, and just dutifully serve as king, nothing can go wrong."

"But... what?"