This also perfectly explains why Vecna's Upside Down spot is the Creel House. It is the place where he discovered his “purpose” and he can hang out there with his deadly spiders and gain strength from taking lives.
Essentially, Vecna was once Henry Creel, a young boy who resided in what Hawkins locals have deemed the Creel House, a now-abandoned dwelling that is believed to be haunted.
There's also a guesthouse behind the main house. But you won't find Vecna on the premises anymore. “Not to worry, the previous resident of the third floor has since been relocated by a single exterminator - we think,” the listing said.
A fearsome entity aligned with the Upside Down, Vecna had humble origins as the human Henry Creel. After moving to a new home in Hawkins in 1959, the young Henry discovered he had remarkable psychokinetic abilities and could manipulate the perceptions of others.
Now, the real-life residence that played Creel's creepy abode (and also doubled as Vecna's villainous lair) is on the market in Rome, Georgia—not the fictional town of Hawkins, Indiana.
It's revealed that Vecna is actually Victor Creel's son, Henry. After realizing he has powers while feeling alone in his own home, Henry decides to attack his own family and kill them to test his power. Victor is framed for the murders at Creel House, while his son is taken away.
There's only a short time between when a recognizable Bower first shows up on screen in Episode 6 to the end of Episode 7 when Eleven blasts Henry into the Upside Down, permanently disfiguring him and turning him into Vecna, but Bower makes the most of every minute of it.
While intending to get his revenge on Eleven and Brenner, Vecna also goes after victims who have dealt with traumatizing experiences in the past (reminiscent of his childhood and his time at the Hawkins lab).
Realizing he had tremendous psychic power, he haunted his family with visions before ultimately killing most of them. His father was framed for the murders and locked away in a mental hospital as a disturbed serial killer. Henry then found himself in the care of Brenner, who decided he wanted more kids like the boy.
He believed that the construct of time and monotony needed to be destroyed. So, in his mind, by destroying humanity, he was doing it favor. That's what makes him so evil.
Vecna isn't as terrifying in the bathroom. Actor Jamie Campbell Bower, who played the complicated villain in “Stranger Things 4,” revealed that his terrifying Freddy Krueger-esque full-body prosthetics included a “flap” for him to use the restroom without getting out of costume.
The final scene of Volume 1 shows a shot of Vecna, and a close up of the 001 tattoo on his arm, confirming that Henry Creel, a.k.a. Number One, became Vecna.
One of the most important sequences in this episode featured Vecna showing Nancy the real circumstances of the “eyeball murders” in the 1950s, with flashbacks indicating that young Henry Creel murdered his family when his mother tried to get him psychological help and he intentionally framed his father Victor for the ...
Essentially, Vecna hates humanity, and wants to take over their world. He had hoped that Eleven would help him achieve this goal. But when he realised she wouldn't, Vecna instead used her.
What Does Vecna Want? Vecna's goal is to open as many gates to the Upside Down as he can, in order to help the Mind Flayer.
Through the window, Max saw her real body levitating above the cemetery, her friends panicking on the ground below. Bracing herself, Max pulled at a vine in Vecna's neck, causing him to writhe in pain and accidentally release her from the vines' grasp.
His first victim was Chrissy Cunningham. Vecna targeted Chrissy by using her depression and eating disorder against her in his visions. Chrissy was killed in Eddie Munson's trailer, and the first gate was opened on the ceiling.
Vecna's obsession with time appears to be linked to his hatred of humanity. He views time as a human imposition on the natural world; an attempt to impose order on nature.
Then Eleven—who in this future moment discovers that she in fact does not have the blood of her siblings on her hands—defeats Henry Creel, sending him to the Upside Down where he gets blasted by lightening and burnt to a crisp and, thus, becomes Vecna.
In simple words, Vecna needs a total of four gates to take over Hawkins and rule it. Now, you must be thinking, why is Vecna killing people if he can take over the complete Hawkins? Well, in one of the previous episodes, it was revealed that with each person Vecna kills, he creates an opening to the real world.
As Vecna, he uses these mental abilities as a way to psychologically weaken and lure in his victims – much in a way that Pennywise, Freddie Kruger, and Pinhead do. (All of which have been cited by show creators the Duffer brothers as inspirations for the villain.) But he does have a surprising weakness: music.
In the real world, he makes the victim levitate while in their trance, before snapping their bones and neck, and crushing their eyes. The murder site then becomes a small gate into the Upside Down, as part of a long term goal to apparently bleed both dimensions into one.
More like this. After previously having tricked Eleven into destroying the chip, Peter goes on a killing spree in the lab until a confrontation with Eleven ended in her casting him into the Upside Down - where after falling through various dimensions and sustaining various injuries, Peter was transformed into Vecna.
As Sink put it: “You kind of learn in the season that he targets people that are in a real [bad] place, and Max is obviously one of those people. Just with everything with Billy, so she was kind of like the perfect target.
Remember also that we have evidence that powers can be inherited -- El inherited her powers from Terri Ives, for example. So it stands to reason that Henry inherited his powers from one of his parents.