Yeah. The story is: Once upon a time, there was a sentient cosmic storm called God Tempst. Its path of destruction led it to Asgard, and Odin fended it off for days while the Dwarves made a secret weapon: a nugget of uru that would suck it inside and keep it there. Odin eventually used the nugget on God Tempest, and out of that nugget came Mjolnir. God Tempest has been trying to escape ever since.