What did Thor lose in Norse mythology for Loki to help him find?

In Norse mythology, Thor lost his hammer and asked Loki to help him find it.

Legend has it that one day Raytheon got up and found that Raytheon's hammer Muir was missing. He quickly turned to Loki for help. They agreed that it should be the ghost of a giant, so Loki borrowed the feather clothes of an eagle from Freya and turned it into an eagle to look for Jotunheim.

In Jotunheim, he met Solim, the king of frost giants. Thrym generously admitted that he had stolen Raytheon's hammer and said that if he wanted to return it, he would marry the goddess Freya to him.

Thor's story:

One day, a group of people broke into the frost troll's castle and challenged him. ②TG area-Loki arranged several tests respectively. Let the giants Loki and Loki compete for food first, and then let the giants Hideyoshi and Shiyaf compete. As a result, both Loki and Shiyaf suffered a crushing defeat.

As for Raytheon's challenge, → útgarea-Loki asked him to drink a glass of wine, lift a cat and wrestle with a giant old woman, Yili, to prove his strength. However, Raytheon didn't win three games, and his best performance was just to successfully lift a cat's foot.