Loki has always delighted in cheating death, manipulating others into believing he was dead in order to hatch his next scheme. At the end of Thor, he apparently took his own life — but Loki survived death by plunging into one of the many portals he knew could be found in Yggdrasil.
During Thor: The Dark World, Loki deceives Thor, faking his death after Kurse impails him. As Thor cradles his brother, Loki chokes out his "final" words before dying. However, Odin sends a guard to Svartalfheim, and a living Loki swaps places with him, returning to Asgard to dethrone the Allfather.
Loki appeared to die no less than three times over the course of his six appearances in the MCU, starting with his falling into a wormhole in Thor, continuing with his faked death in Thor: The Dark World, and finally his actual death (so it would seem) at Thanos' hands in the beginning of Avengers: Infinity War.
Malekith then proceeds to drain the Aether from Foster's body and into himself, but Loki's betrayal is revealed to be a ruse, and Thor's injury is revealed to have been nothing more than a holographic projection meant to lull Malekith into a false sense of security.
Offical Explanation of Loki's "Death" in Thor: The Dark World
Why did Loki turn bad in Thor?
Summary. Loki's villain origins in the MCU stem from his discovery that he is actually the son of a Frost Giant, which led him to believe that Odin favored Thor over him, causing him to turn against his family and become a villain.
This caused Thor to send lightning towards them, toppling the mine on top of them. Loki apologized and confessed, saying he only thought of the challenge to get the Cup and gain as much respect as Thor. His brother forgave him and found a way out of the mine.
Creation of a branched reality: When Loki escapes with the Tesseract, he creates a branched reality, according to the Russo Brothers, the directors of Avengers: Endgame. This means that a new timeline is created where Loki is still alive [3].
The spell was permanent, making it so Loki only reverted to having blue skin when touching a Frost Giant or one of their artifacts. Since Loki's appearance was a spell, not just an illusion, it could not be broken or reversed by Odin's death.
After a moment of understandable shock and pained anguish, Loki ominously broke out in a fit of laughter. The main reason for Loki's laugh can be summed by an old adage: If you don't laugh, you'll cry. In a matter of moments, Loki learned that the sum total of his schemes and betrayals equaled absolutely nothing.
Like almost all of the Norse gods, Thor is doomed to die at Ragnarök, the end of the world and twilight of the gods, but falls only after killing the great serpent with his powerful hammer Mjollnir, dying to its poison; his sons Magni and Modi survive Ragnarök along with a small number of other gods and inherit his ...
By saving and organizing every existing timeline, Loki has become the God of Time — a higher being who keeps the past, present, and future of every universe from being erased by outside forces. However, Loki has also become the God of Stories, as he has placed everybody's personal journey above his own.
Here, holding on to all of the timelines, he became a kind of tree god, physically representing the Norse tree of life, Yggdrasil. It was a poignant and painful ending for Loki, who now seems to be sentenced to being alone for eternity as he watches over the timelines.
By far, Loki is now the strongest MCU character. It was shown in season 1 of Loki that Timelines=the universe. Loki held infinity of them with his strength.
Technically speaking, the real Loki — or rather, the Loki that fans have watched since 2011 — is still dead. The version in the series is from a different timeline, and he is at a distinct point in his character growth.
So while he essentially killed half of life in the universe with the snap, he saw those deaths as necessary for the galaxy to thrive. This is ultimately the reason why he didn't go out of his way to kill Thor (or any other character) at the beginning of Infinity War.
When Ragnarök, the end of the world as predicted by a seeress, came and the Bifrost broke, Heimdall blew his horn Gjallarhorn to awaken the Aesir gods. During the final battle, Heimdall fought the evil and treacherous Loki and they both died.
Yes Loki is dead, he got killed by Thanos in Avengers Infinity War (2018). But the Loki from the Loki series, is indeed Loki, but not the same Loki that died in Infinity War.
Loki is Thor's adopted brother and the Asgardian god of mischief. In his younger years, he and Loki were very close and good friends, even if occasionally irritated by Loki's mischief. However, it is later revealed that Loki was often jealous of Thor even back then, and resented being left in his "shadow".
Loki has changed role and aspect many times, but he is still mostly remembered as Thor's antithesis, his resentful adoptive brother who grew up to hate the God of Thunder. One of the reasons for Loki's bitterness is that Odin always favored his "real" son, Thor, during their childhood.
