In 1984, Will Byers, a rescued victim of the Demogorgon, became a vessel for the Mind Flayer. Will's possession allowed Vecna and the Mind Flayer to unleash a horde of adolescent Demogorgons, or 'Demodogs', upon
The friends and family of Will Byers, one of the Demogorgon's victims, slowly began to uncover the truth about the creature, with the help of the escaped Eleven. The creature was finally defeated in a showdown with Eleven at Hawkins Middle School.
One of the theories could be that Will has some supernatural powers that caused the monster to be lured to him even though he wasn't injured. That could also be the reason he could communicate with his mother using the lights.
While attempting to evade the monster, Will hid in his backyard shed. He shot at the Demogorgon with a hunting rifle but was still transported to the parallel dimension. Will spent nearly a week in the Upside Down, and it was a miracle he managed to stay alive.
The Demogorgon
This is the monster that originally took and feasted on Barb (RIP), attacked Nancy through the tree gateway, and tormented both Will and Eleven.
Vecna's first big credited kill was Chrissy Cunningham (Grace Van Dien). He followed that murder with canonically terrible driver Fred Benson (Logan Riley Bruner) and basketball star Patrick McKinney (Myles Truitt). But wait, there's more.
Stranger Things 5's Villain Is Will – Theory Explained
Vecna is apt to use Will's pain in his plan during Stranger Things season 5, where one major fan theory suggests the Upside Down's puppet master will drive Will into joining his plan to destroy Hawkins, thus making him a villain in the series' final installment.
I saw a means to realize my potential, to transcend my human form, to become the predator I was always born to be. Vecna reached out to the Mind Flayer, seemingly using his powers to reshape it into the spider-legged monster he had doodled as a child.
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.
Eleven has a memory during this episode and realizes that 001/Henry Creel (Jamie Campbell Bower) wants her to join him on his evil journey, and she banished him to the Upside Down. 001 then transformed into Vecna, the horrifying Stranger Things villain.
The theory predicts that Vecna wants to regain his human form, and he will use Will to do so in Season 5. Knowing that Vecna singled out Will in Season 1, it's a reasonable theory, but it might go too far. After all, Vecna already has a human form, and he has vowed to eliminate humanity.
Using past traumas to break down his victims, Vecna brought Nancy to the pool where Barb was killed by the Demogorgon and revealed her mangled corpse. Vecna then taunted Nancy with her own feelings of guilt - that she was responsible for Barb's death and had forgotten about her.
When Will was trapped in the Upside Down and captured by a Demogorgon, the Mind Flayer became interested in Will and decided to use him for his own purposes, showing no care for him.
Vecna was the one who originally kidnapped Will in season 1.
The Russians then discovered that location was vital and that the gate was once opened before in Hawkins, IN, thus building a secret base beneath Starcourt Mall. Alexei reveals that the gate is opening. (And, as we see, allowing the Mind Flayer to invade Hawkins.)
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.
We know Eleven was born in 1971, which means her mom got pregnant with her during the tests, sometime in 1970. A 1959 flashback in the mid-season 4 finale reveals a 12-year-old One (Jamie Campbell Bower). That puts One, a.k.a. Vecna, as 24 when Eleven was born.
Played by Jamie Campbell Bower, each prosthetic was glued to his skin with medical adhesive by prosthetics designer Barrie Gower and his team. For the finishing touch, Vecna was covered in "glossy slime to make him really, really glossy and wet looking," according to Gower.
Ultimately, it is revealed in Stranger Things season 4's finale that the reason why Vecna was killing Hawkins teenagers was to create a massive gate that merges the Right Side Up with the Upside Down - and he specifically needed four bodies to do so.
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).
In the D&D realm, a defining feature of Vecna is that he's missing his left hand and left eye. This is because his trusted accomplice, Kas the Bloody-Handed, betrayed him and used the sword Vecna created himself to chop off his left hand and remove his left eye.
Lonnie was an implied alcoholic and drug addict who was abusive to his family; he forced his son Jonathan, who was 10 at the time, to shoot a rabbit, while using homophobic slurs against his other son Will.
Sharing more about Eleven's real father Andrew Rich could be a great way to wrap up the story.
The theory is that Karen Wheeler might be Vecna's sister, Alice Creel. As we know, Vecna is actually a man of many names, including 001, Peter Ballard and Henry Creel. We saw Henry and Alice together as children briefly in a flashback and it is believed that Henry killed his sister along with his mother.