I thought the thread had died, lol.
I been reading some 70s doctor strange stuff, but made a detour to see if I could finally figure out what is up with scarlet witch magic and it is kind of hilarious the amount of coincidences that occur because the writer wanted, in a single 20 page book, to set up the reveal that the twins are magneto's sons, to retcon the origin story so it looked like an unrelated event, to explain Wanda's natural disposition to chaos magic, to (re)introduce the demon responsible, turn him into a menace and then having the avengers defeat him.
A woman escaping from her husband (not yet revealed to be magneto) give birth to twins at wundagore Mountain, evil lair of the high evolutionary. She dies at birth.
At the same time, whizzer and miss america come to the same mountain and also have twins, but both the mother and the babies die. Bova lies to the husband that the babies survived, but he rejects them anyway (this is the retconning of the origin story).
At the same time, the high evolutionary and a time traveling Morgan Le Fay battle some chaos demon who was hibernating on the mountain since the middle ages, he was there by chance afaik.
The fight happens at the exact same time the twins are born, so the demon escapes into Wanda.
Wundagore mountain itself has a weird story, since it is one of the only sources of vibranium outside Wakanda, but the high evolutionary set up his lab there without knowing it, also without knowing a chaos demon was there.
And I am pretty sure the story is more convoluted still and I am actually forgetting something. And of course, all of this so they being magneto's sons (and maybe even mutants) to also be retconned.