system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] Would Magneto be able to use his powers to lift up Thor's hammer without too much of a struggle?
gpt
What the people who keep asking these questions don't realize is that Mjolnir isn't exceptionally heavy.  It weighs about as much as a hammer that size would weigh. What makes it impossible to lift is the fact that, when someone tries to wield it, the magic resists this and pulls it back down to the ground, which is the simplest way to stop someone from wielding it. Despite the fact that Magneto wouldn't have to touch it, trying to lift it via magentism would still be with the intent of wielding the weapon, and therefore he would be unable.

However, it is possible he still would, as other indirect methods of wielding the hammer have worked before. For example, the Hulk has picked up the ground around the hammer in order to throw it at people.  However, the amount of metal in the hammer is relatively small, and Magneto wouldn't get any of the hammer's magical properties by wielding it this way, so it would be more effective for him to simply use the other large amounts of metal that are almost certainly around him at all times.

On a side note, it is feasible that a being with greater power than the enchantment would be able to lift the hammer.  However, the enchantment is extremely powerful, so this would take something stronger than the Hulk (and likely stronger than Odin) to do. This being also would be unable to use the magic porperties of the hammer, and the enchantment would resist their attempts to wield it in combat, making it a pretty useless weapon overall.