Ahaha I got asked this in Discord about Wanda:
“From what I gather Wanda and Pietro were originally the biological children of Magneto (who is Jewish) who were adopted by a Romani family? Then the dad thing got retconed. But they’ve always been at least half Romani? Most of the time they’ve been ethnically Jewish as well, with Magneto being their father? She started out with red telekinetic bolts but then switched to reality warping? God damn you Marvel for being unable to stop retconning.”
OH MY POOR FRIEND
They then had to suffer this LENGTHY EXPLANATION and NOW YOU SHALL TOO
“ The twins are introduced in the 60s. They're not related to Magneto or anyone else at that point, nor are they Romani or Jewish, just "from the heart of Central Europe" They're described as orphans iirc. We later learn in the 70s that actually, they are the long-lost biological children of The Whizzer aka Robert Frank and his wife Miss America aka Madeline Joyce (not to be confused with America Chavez, a much later character) They were actually called Wanda and Pietro Frank for a little while after discovering this. Then about twenty issues later we meet Django Maximoff, the man who raised them, and a few issues away from that, we meet Bova.
Bova is a humanoid cow woman created by the High Evolutionary, who has a habit of "uplifting" animals like that. Bova was also the midwife who delivered Pietro and Wanda. She explains that their mother was a woman named Magda fleeing her husband who had strange powers and didn't want the twins to fall into his hands, but it's not revealed who the husband was. She explains how she tried to give the twins first to Robert Frank, because she had ALSO delivered his wife's baby, but both Madeline and the Frank child died in the process, and Robert ran away in grief before he could hear the whole story, hence why the twins and he thought he was their bio-dad. So the High Evolutionary had Bova give Wanda and Pietro to Django and Marya Maximoff, a Romani couple, instead.
It's not until 1983 that Magneto reveals his discovery that they're his children. At some point around this same time Magda gets established as Romani too.
Magneto and Magda being their bio-parents is pretty static for the next few decades. In 2014, an event called Axis happens that I don't know about but it results in Wanda casting a spell that effects everyone she's related to, and Magneto isn't effected, showing he's NOT her bio-father after all. In 2016 the Scarlet Witch miniseries reveals Magda's not her mom either, Natalya Maximoff, sister of Django, is. Bio-father still unknown. But most fans haven't recognized this retcon because it's stupid.
As for her powers that's a trip too, strap in.
She's introduced in the 60s with the ability to fire hex bolts. They're often described as "probability manipulation" but they're really more very specific, localized telekinesis. Makes people trip, guns jam, screws in a structure come loose, etc. Minor disasters that negatively impact her enemies, but she wields it really well and effectively. I honestly liked that better; it seems like it can only be an annoyance, but because she's creative and a quick thinker in crisis, it does a LOT of damage.
In the 70s, she meets Agatha Harkness, the nanny of Franklin Richards who it turns out is a badass witch, and she says Wanda actually is a witch too, a real one, and she wants to tutor her. Unlike the WandaVision series, which I haven't seen and don't plan to, she's not evil. She starts tutoring Wanda sincerely. Wanda begins to learn magic, which augments the power of her hex bolts. Wanda later discovers that the reason she has magical aptitude is that she was touched by the dark god Cthon at birth so that he could use her as a vessel for his return, and he posses her. Getting posessed by Cthon or other magical beings happens a lot to Wanda after this point, as does various losses of her agency/free will.
While she's famous for "chaos magic" now, the term isn't actually used for her til 1998, over 20 years after she started practicing witchcraft. The chaos magic does allow her to warp reality to a certain degree. The reality big huge warping she's famous for doesn't happen til the 2000s, with House of M, when she rewrites the entire world. A common misunderstanding is that this is how her power NORMALLY is. It's not. She was yet again posessed by something, in this case the Life Force of the ENTIRE PLANET, which was a big boost. It's not her normal state.
What she can do now though is still nothing to sneeze at. Like she's very OP at this point just at her default. It'd be easier to list what she CAN'T do than what she can.
I go with her having the backstory that's most well-known and lasted longest and makes the most sense (Magda/Magneto bio-parents, raised by Maximoffs) And just her hex bolts as her power, they're cool enough. Plus like. . . I don't think she needed chaos magic and reality warping and a ton of trauma and loss of agency to be cool. I'm kinda sick of the tendency in superhero media to give a woman a ton of raw power but at the expense of her sanity/agency/control/etc. Just gimme someone with a strong interesting personality who makes her own choices!”