Thor's Hammer Returning Makes Ragnarok's Mjolnir Destruction Worse
In Thor Ragnarok when Hella shows the true history of how Asgard came to be she is shown wielding Thor's Hammer Mjölnir which she also earlier destroyed. : r/MovieDetails
Mjölnir: 10 Things You Didn't Know About Thor's Hammer
How was Hela able to break Thor's hammer in Thor: Ragnarok? - Quora