Scarlet Witch is a force to be reckoned with. While other Marvel characters such as Captain America and Iron Man are considered the heaviest hitters due to their movies, the truth is that Wanda Maximoff is arguably the most powerful being in the Marvel Universe. The number of crazy things Scarlet Witch has done in the comics transcends beyond hero or villain, putting her into a near-god category.
Scarlet Witch often uses her reality-bending abilities to bring order among the chaos. However, many Scarlet Witch plotlines in the comics showcase how dangerous she can be. Then there are the plotlines which she's just crazy in general. Here is a taste of some of craziest, most batsh*t things Scarlet Witch has done in Marvel comics.
She Wiped Out An Entire Population With Three Words—"No More Mutants."
Three simple words changed the entire Marvel Universe. In 2008's House of M story arc, Scarlet Witch simply uttered "no more mutants" and nearly the entire world's population of mutants vanished. Aside from a couple hundred X-folks, all the mutants on Earth were de-powered. It's the first time a genocide occurred without any mass deaths being involved.
She Used Demonic Energy To Give Birth To Twins
Okay, this is gonna be a little messy. Since robots and humans can't bear children the old-fashioned way, Scarlet Witch used magic to conceive her twin boys, Thomas and William, but it turned out that the twins' souls were actually shards of the demon Mephisto. Wanda did give birth to them, but Mephisto absorbed the boys back into his being, leaving her emotionally crushed. Wanda's mentor, Agatha Harkness, removed Wanda's memories of her children from her mind in order to protect her. These events would eventually lead to the chaotic event that nearly ended the Avengers. Also, it turns out that the souls of the two boys were reincarnated into the Young Avengers Wiccan and Speed. That's comics, people. Comics.
She Had Sex With Her Brother... Maybe
Marvel's Ultimates line gave creators a license to change up established Marvel characters without being bogged down by continuity or established characteristics, but that wasn't always a good thing. In Mark Millar's Ultimates run, it was teased that Scarlet Witch and her brother, Quicksilver, engaged in incestuous activities, but it was plausibly deniable. However, the ambiguity was outright shattered when Wolverine spotted the siblings sexing in Ultimates 3. It's gross and wrong, but we can all pretend that Wanda used her reality-altering powers to make Quicksilver NOT her brother for a technically-not-incest quickie, right? Right!? Ugh, wrong.
She Killed Hawkeye, Resurrected Him, And Then Had Sex With Him
Because of her reality-bending powers, Scarlet Witch was technically responsible for the death of Hawkeye in Avengers: Disassembled. Later, she tried to make it right by bringing him back to life after the events of House of M. Hawkeye, after taking some time to recover from the mindf*ck of it all, finds Wanda at Wundagore Mountain in New Avengers #26.
However, Hawkeye quickly realizes she has no memory of her past. So, obviously, they have sex. Hawkeye then quietly exits, letting Wanda be at peace. Sure, it was later retconned that Hawkeye nocked his arrow into a Doombot posing as Wanda instead of the real Scarlet Witch, but the whole thing is still really f*cked up.