Mjollnir was stolen by the giant Thrym, who asked as ransom the hand of the goddess
Loki was convinced that the Giants of Jotunheim had conspired in the theft of Thor's hammer because it was one of the most powerful weapons in all the Worlds. Loki shifted back into his original shape when he arrived in Jotunheim and as Loki is a giant himself had no problem entering the hall of the giant king Thrym.
There came Loki to the land of Jotunheim - the land of the giant. In Jotunheim, Loki met a giant called Thrym. He told Thrym that Mjolnir was missing and fast-talked with the giant. The giant then admitted his theft and hiding Mjolnir eight miles below the earth.
Odin : [enchants Mjolnir] Whosoever holds this hammer, if he be worthy, shall possess the power of THOR!
The hammer was used extensively by Thor as his primary weapon until it was destroyed by Hela in 2017. The broken pieces were eventually made into a tourist attraction in New Asgard.
Every MCU fan remembers with excitement the moment in Avengers: Endgame when Captain America (Chris Evans) first lifted Mjolnir. This didn't come as a surprise to Marvel comic fans, since Cap has proved on multiple occasions to be worthy of the power of Thor.
However, as Odin's first born and most loyal and faithful servant, Hela was the original wielder of Mjolnir. Drawing enhanced strength and power from Asgard itself, at one point, Hela was the most powerful warrior in all Nine Realms, unmatched in every way.
Thanos didn't lift Mjolnir, Captain America did
With Mjolnir's worthiness enchantment resulted in Thor being able to lift the hammer only if he is considered to be worthy, but likewise, the enchantment is not discriminatory in nature, and anyone who is deemed worthy is able to lift the hammer.
He saw too much of himself in his son; a brash and reckless man whose imperialistic ways would plunge the Nine Realms into chaos and launch Asgard into an age of conquest. No wonder Odin was so angry; when he judged Thor as unworthy, he was also casting judgment upon the man he used to be.
While Thor is Odin's son, they don't always agree and Odin occasionally punishes Thor for his love of Earth, which takes him away from his duties on Asgard.
The Æsir had to agree. Brokk, denied full vengeance, decided that since Loki's head was his, he could stop Loki's glib talk. Using Eitri's awl, Brokk sewed Loki's lips shut with a leather thong. After a time of silence, Loki managed to cut the thong and make plans for revenge.
Mjolnir was forged by a dwarf named Sindri. While he was creating it, Loki, the trickster fire god, disguised himself as a fly and attempted to interfere with Sindri's work by buzzing around him. As a result, Mjolnir's handle was unusually short.
Upon learning his true parentage, Loki feels anger and betrayal for Odin's deception, believing the Allfather saw him as a monster never meant for the Asgardian throne. This fuels his unrelenting jealousy of Thor and feelings of inferiority.
Loki and Thor are both gods and have immense godly powers that make them somewhat impervious to harm, though they can be beaten; they can lose eyes (Thor) and they can die (Loki). If the metric is physical strength, then Thor is easily the winner.
In the stories (and the Marvel movies), we see the god throwing the short-handled hammer at his enemies. The top of the Mjölnir often (but not always) comes to a slight point, giving the overall object a somewhat diamond shaped appearance. This shape is similar to an inverted Tyr rune.
Loki was bound to a rock (by the entrails of one or more of his sons, according to some sources) as punishment, thus in many ways resembling the Greek figures Prometheus and Tantalus. Also like Prometheus, Loki is considered a god of fire.
To answer the question right away, Zeus and Odin are not the same, nor have they ever been thought to be the same entity at any point throughout history. Zeus is the king of the gods in Greek mythology, whilst Odin is the king in Norse mythology.
All things considered, Zeus is certainly on Odin's level, so as long as Marvel portrays him accurately, he should be one of the MCU's most powerful characters.
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.
Yes, even Spider-Man has been worthy of holding the hammer of Thor.
Yes, as a shock to many, Superman has briefly lifted the mighty hammer in a phenomenal crossover with Marvel and DC Comics.
Avengers: Age Of Ultron Confirmed Iron Man Wasn't Worthy
Tony Stark was the second one to try, even joking about ruling Asgard if he lifted the hammer and what he would do as king, but his always overly-confident attitude quickly changed when he realized he couldn't lift the hammer.
Zeus. It should come as no surprise that, in a one-on-one battle of Zeus vs Thor, Zeus would easily triumph.
Thor realized he was not going to be able to defeat her, and in an interesting turn of events, he ended up restoring Surtur's power by having Loki drop the crown in the Eternal Flame. This unleashed Ragnarök, which was the only way to defeat Hela as Asgard was her power source.
During this, Odin will ride to fight Fenrisúlfr. During the battle, Fenrisúlfr will eventually swallow Odin, killing him, and Odin's son Víðarr will move forward and kick one foot into the lower jaw of the wolf. This foot will bear a legendary shoe "for which the material has been collected throughout all time".