Warning! Spoilers ahead for Marvel's WandaVision, episode 9

What has Wanda Maximoff unleashed at the end of Marvel's WandaVision? At the end of the Disney Plus series' finale, Wanda defeated the witch known as Agatha Harkness, fully embracing her power and title as the MCU's Scarlet Witch. However, as the battle neared its end, Agatha revealed that Wanda has no idea as to what she's just done, and she further warned the Scarlet Witch that she had just unleashed something seemingly dangerous and terrible for the future. While it's possible that Wanda's actions in the finale will lead into the Doctor Strange sequel, she might have also set free a dark new god upon the MCU.

In the series' finale, Wanda initially tried to ignore Agatha's claims that she was the Scarlet Witch and that her power came from chaos magic. However, Wanda ended up embracing her role as an incredibly strong magic user with power that "exceeds that of the Sorcerer Supreme" according to Agatha. While Agatha tried to absorb and take all of Wanda's powers for herself, Wanda had secretly cast runes during their fight around every side of the hex of energy surrounding the town of Westview and the two of them. As stated by Agatha in the series' 8th episode, only the witch who casts the runes can use magic, which is what ultimately lead to the dark witch's defeat after Wanda reabsorbed her power and truly became the Scarlet Witch (to Agatha's apparent horror).

Related: How Agatha Harkness' Magical Powers Are Different From Scarlet Witch's

As previously mentioned, Agatha warns Wanda about what she's just done, revealing that she's just unleashed something that Agatha says will require her assistance. However, Wanda chooses to trap Agatha in her role as Agnes, Westview's nosy neighbor (at least until Wanda will have need of her). Regardless, something dangerous seems to be on its way for the future of the MCU, and it's all thanks to Wanda becoming the Scarlet Witch. The first thing that comes to mind is a potential breaking of the multiverse. Wanda will be featured in Doctor Strange in the Multiverse of Madness, and it could be that her rise in power as a chaos magic wielder could inadvertently cause some major dysfunctions to reality. This could then be the inciting incident leading to multiversal mayhem for herself alongside Doctor Strange.

Scarlet Witch Chaos Magic in WandaVision and Doctor Strange

It's also possible that Wanda becoming the Scarlet Witch could have inadvertently opened the door for the dark god Chthon with her chaos magic. Chthon is the Elder God of Chaos in the Marvel Universe, and is also the supernatural author of the Darkhold, the powerful book that was in possession of Agatha (and is now in Wanda's). Chthon has also possessed Wanda on more than one occasion in the comics, as he exists as an originator for the creation and wielding of chaos magic. Now that Wanda has chosen to fully embrace her power, she's learning from the very book that has provided Chthon with access to Earth in the comics. The same thing could very well happen in the MCU as well, which would no doubt bring untold destruction to the universe.

Either way, it seems doubtful that Agatha was bluffing about Wanda having unleashed something big and dangerous with her power. Whether it's a link to Doctor Strange, something grander in the works such as Chthon being set free to wreak havoc, or a mix of the two, hopefully Wanda will be prepared to face the consequences of whatever she's accidentally unleashed upon the MCU after the epic finale that was Marvel's WandaVision.

More: What's Next For Scarlet Witch In The MCU After WandaVision?

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