However, the film also implies that the hammer only sees
The whole idea was to give picking up the hammer a new downside. It made for a very poignant story, along with an unworthy Odinson and the War Thor. This was explained way back in Thor #1, or Journey into Mystery #1 or whatever it was. It was set up this way so that Mjolnir would not cure Donald Blake's broken leg.
A happy-go-lucky, ABBA-soundtracked montage, the scene features Thor making Mjolnir promise that it will always protect Jane, no matter what — even if it means coming back from the “dead” after being smashed to pieces by his villainous sister Hela.
She can only maintain this form while wielding the hammer, and when she puts it down, her mortal form is weaker than the last time. However, where in the comics Mjolnir is specifically targeting her treatment, in Thor: Love and Thunder, each use of Mjolnir drains Jane's mortal energy.
In a moment of wistful affection for his girlfriend, Thor asked his trusty hammer to always protect Jane, and in doing so unwittingly enchanted Mjolnir to do just that. Just like Thor's father Odin once enchanted the hammer to only be lifted by someone who is worthy, Thor cast a spell that let Jane use its powers.
As shown in flashback in MIGHTY THOR (2015) #705, Jane was telepathically called by Mjolnir to the moon, and she picked up the magical hammer. (OG Thor would go by his last name “Odinson” as a result.)
One possibility is the simplest one available, which would hinge on the rules put on the hammer by Odin's enchantment, which are “Whoever holds this hammer, if he be worthy, shall possess the power of Thor.” Jane was able to take Thor's place in the comics because she became worthy enough to wield Mjolnir, so if the ...
When Thor and Jane are still dating, Thor asks Mjolnir to always protect Jane no matter what.To keep its promise to Thor, the hammer calls to Jane telepathically, guiding her back to New Asgard.
In Love and Thunder, we learn that all the pieces of Mjölnir are kept in New Asgard, as a touristic attraction to those who wish to see the God of Thunder weapon. As a tourist guide reveals, no one was ever able to lift Mjölnir's fragment, indicating that Odin's enchantment is still engraved in the hammer.
But after watching new Thor in action, he admits that she deserves the mantle. Thor Odinson initially suspects Jane might be this new hero. But he eliminates her from his list of suspects because she is going through chemotherapy for breast cancer, which, he reasons, would make her too weak to fight.
Years later, Mjolnir reforged itself for Jane Foster, transforming her into the Mighty Thor. It was able to stave off her stage 4 cancer, but weakened her mortal form's ability to stave the cancer off every time she harnessed the hammer's abilities. After she finally succumbed to her cancer, Thor reclaimed the hammer.
After Jane's passing though, we see that Thor does indeed reclaim Mjolnir. In the end, he is seen fighting side-by-side with Gorr's (Christian Bale) and Eternity's daughter, Love (India Rose Hemsworth).
Originally there was no restriction placed on the hammer for who can use it but after Thor's reckless behavior, Odin Borson placed an enchantment on it. This spell read "Whosoever holds this hammer, if he be worthy, shall possess the power of Thor." Only those deemed worthy to lift Mjolnir can.
Hence, Mjolnir determines worthiness based on Odin's definition of worthiness. However, since Mjolnir also has a conscious being within it, in the form of God Tempest, another likely explanation is that it is God Tempest that determines the worthiness.
Even more people don't know the hammer has a name. During Marvel Comics Original Sin story-line we saw Thor Odinson become unworthy to wield the hammer. During a fight, Nick Fury was able to utter a simple sentence in Thor's ear. Whatever was said to Thor caused him to be unworthy to wield Mjolnir.
Mjolnir is a hammer, and was enchanted by Thor's father, Odin, so that only those the hammer deemed "worthy" are capable of wielding or even lifting it. Stormbreaker is an axe, and although it does not have such a worthiness enchantment, its power is such that a mere mortal attempting to wield it would be driven mad.
It is revealed that Thor and Jane broke up sometime after the events of Avengers: Age of Ultron. When a fangirl tells Thor she's sorry that Jane dumped him, he sheepishly replies that it was a mutual breakup.
Portrayed by
Love is the daughter of Gorr the God Butcher, whose death by starvation triggered her father's murderous crusade against all gods for forsaking them. She was ultimately resurrected by the cosmic entity Eternity in accordance with Gorr's wish, brought on by Thor's advice.
Mysteriously, the broken pieces of Mjolnir, the hammer of the thunder god, transformed her into the Mighty Thor and gifted her the superpowers of Thor, to battle threats internal and external. Wielding Mjolnir herself, she had become a godly protector and a new hero was born!
When wielding Mjolnir, Foster gains all the powers of Thor, including the base Asgardian traits of superhuman strength, speed, stamina, and durability, as well as Thor's flight and control over lightning; though only a tiny portion of those powers.
There are two versions of Mjolnir in the MCU. The one that was pulled from the timestream was returned to its proper place in the timeline by Captain America, so it's no longer a part of the equation. As for the present-day Mjolnir, it's still in pieces.
In Norse mythology, the hammer Mjolnir is simply too heavy for anyone other than Thor to lift, but over the centuries, the story evolved and even super-strong entities couldn't lift the weapon.
In the original Norse mythology, there is no specific charm that prevents someone from lifting Mjolnir, but it is said to have been so heavy that only Thor could easily wield it as a weapon, with 4 giants or the combined strength of his two sons Modi and Magni being required to even lift it in some writings.
Odin placed several enchantments upon Mjolnir prior to Thor wielding the hammer: This is reflected in the inscription on the side of Mjolnir, which states: Whosoever holds this hammer, if he be worthy, shall possess the power of Thor. For almost the entirety of Marvel continuity, this has exclusively been Thor.
What did Jane Foster whisper in Thor's ear? The catchphrase that Jane used out loud earlier in the film was, “eat my hammer”.