Thanos employed Loki to invade New York, offering him his army in exchange for Loki getting him the Tesseract which would later be revealed as the Space Stone. Even when he was power-hungry and arrogant, Loki was smart enough to know to fear Thanos.
Traveling through the wormhole, Loki arrived in a part of the universe called Sanctuary and met the Mad Titan Thanos and The Other, the former who offered a pact that would allow him to become ruler of the Earth while he would take the Tesseract which was being studied by S.H.I.E.L.D. Thanos provided Loki with a ...
So the theory from Reddit user TheMediocreCritic argues that Thanos sought out Loki for the invasion of Earth. He didn't want him to acquire the Tessaract – he wanted to destabilise Asgard, leaving Nidavellir unprotected.
Thanos would have given the Mind Stone to Loki so he could test how the inhabitants of Earth defended themselves, but to their surprise, their attack triggered the creation of the original Avengers team, making way for Thanos' biggest enemies in the MCU.
Instead, Thanos used the Mind Stone's immense power to influence Loki, without Loki being aware this manipulation was occurring. With Loki now under the control of the Mind Stone, Thanos could send him off with the scepter and not worry about being turned against.
MCU Theory: The Tesseract Used Loki to Escape Thanos
How did Loki survive Thanos killing him?
From his first MCU appearance in 2011's Thor, Loki revealed his ability to create duplicates of himself and fake his death. At the end of the film, Loki was seen careening through space to his apparent death, only to resurface during the end credits scene.
In Loki's official character bio on the Marvel website, it states: "Gifted with a Scepter that acted as a mind-control device, Loki would be able to influence others. Unbeknownst to him, the Scepter was also influencing him, fueling his hatred over his brother Thor and the inhabitants of Earth".
In The Avengers, Loki tried to mind-control both Hawkeye and Iron Man, but while he succeeded with Hawkeye, his attempts failed on Iron Man due to his arc reactor. Iron Man's arc reactor protected him from Loki's scepter, as the scepter needed to touch organic matter to work, and the arc reactor was not skin.
This stemmed from his childhood and the belief that Odin didn't love him. While Odin's hiding of Loki's true parentage and Thor's demeaning behavior may have influenced Loki, ultimately he is to blame for his villainous actions due to his own issues with self-acceptance and misinterpretation of his upbringing.
Loki decides he wants to become supreme ruler of earth. He cuts a deal with a big, bad purple alien named Thanos: Thanos will lend Loki an Infinity Stone called the Mind Stone (which Loki wields in his scepter) so that Loki can retrieve the Tesseract (and Space Stone inside it) for Thanos.
Was Loki sick in the Avengers? It looked like he almost fell a couple times. He looked sick because of the effects of the Mind Stone within the scepter.
Loki went from perhaps the most selfish, evil character in the MCU—one willing to commit genocide on earth in The Avengers—to someone fully willing to sacrifice his life, isolating himself from the friends and family he had finally made, in order to essentially preserve the flow of all space and time and save the TVA.
Thanos only kills that pose a threat at the moment (e.g. Loki and Heimdall). Thanos views everyone as being reasonable and doesn't expect people to agree with his 1/2 the universe ideology, which is why he'll let Thor play the lottery and survive or die later.
Thanos kills half of the occupants and threatens to kill Thor as well, but Loki gives up the Tesseract in order to save his brother's life. Thanos proceeds to crush the Tesseract to acquire the Space Stone. He tells his children to acquire the two Stones on Earth.
While neither Loki, Doctor Strange, nor Miles are responsible for specifically breaking the multiverse, they all have directly contributed to its volatile state in the wider Marvel universe.
Scarlet Witch Was Able To Destroy The Mind Stone Because Of Her Connection To It. Vision states during Avengers: Infinity War that Wanda is the only hero with enough power to destroy the Mind Stone, suggesting that her powers operate on a "very similar signature" to the resonance of the Mind Stone.
Originally Answered: Why didn't Loki use the Tesseract against Thanos on the Asgardian ship? At the time, Thanos only had one Infinity Stone, and the Tesseract should have been able to hold its own against him, especially with the help of Thor and the other Asgardians. Simply because he doesn't know how.
Why couldn t Loki lift the hammer? Loki would never be worthy at this point: he was hateful towards his brother, sought vengeance, and had dark ambitions to oust his brother.
Stark's resistance to the Mind Stone likely stemmed from the new element he created to power his arc reactor in Iron Man 2. Needing the new element to save his life, Tony uses Project Pegasus' resources for help, the same organization which was created to wield the Tesseract's power.
He was under the influence of the Mind Stone that was in the Scepter, as were the Avengers in that scene where they were all sniping at each other. But Loki had been under the influence longer, and he had such a deeply rooted hatred and desire for revenge, it affected him more. Both for sure!
Yes. Loki died in “Avengers: Infinity War” when Thanos attacked a ship traveling from Asgard (which had just escaped the apocalypse, as seen in “Thor: Ragnarok”).
In Avengers: Endgame, Cap and the team travel back to the events of 2012's The Avengers to return an Infinity Stone to its proper place. While they're there, Loki steals the Tesseract and disappears with it.
Thor knew that Loki was alive and on Earth not because of Heimdall… because of Frigga. In the comics version of The Movie Thor (2011), it is noted that Frigga communicated with Loki and warned Odin & Thor that the God of Mischief is alive and well. Hope this helps.
