Mimir states that according to the prophecy, the Ragnarök battle between Thor and the Serpent is so intense that it will shake the Yggdrasil violently, sending the Serpent back in time, before its own birth. Thor fought the World Serpent in Midgard, in a battle so intense that it could be felt in all the 9 Realms, the Serpent proved to be as strong as Thor and it ended up as an stalemate, both of them hate each other, who will extend to Ragnarök, where they are destined to fight again and kill each other. Later, Thor and Odin would go on other rampages, abusing their power throughout the Nine Realms and generally making the inhabitants of the different worlds miserable. When Thrym shown the hammer, Thor showed himself and took back Mjolnir to kill Thrym by smashing his skull and continue to kill the other Frost Giants until Freya casts a spell to return to Asgard and cursed Thor from ever going to Jötunheim which caused the God of Thunder hold resentment to Freya. After Thor lost Mjolnir to the Thrym, he sneaked with Freya to Jötunheim for Freya and Thrym's wedding. The cunning Frost Giant King, Thrym stolen Mjolnir and get away to Jotumheim while Thor (which Mimir described as the Thunder Lummox) slept foolishly. Thor killed the eight arms frost giant, Starkaðr by tearing off his arms one after another. Thor gives all the credits to his favored son, Magni while Modi remained his jealousy towards his brother. However, Thor was drunk and got crushed by Hrungnir's corpse until little Magni and Modi entered and removed Hrungnir's body to save him. Thor killed the stone giant, Hrungnir by smashing his head with his hammer, the blow was so intense that Thor got stone parts on his skull to this day. But unbeknownst to him, Hrimthur's plan was completed for the preparation for Ragnarök when Surtr will arrive to burn down Asgard to ashes and he put a secret weakness in the wall. When Odin learned Hrimthur's identity, Thor killed the son of the Stonemason, Thamur. Thamur's son, Hrimthur, disguised himself as a mortal and offered to create Asgard's wall in exchange of an audience with Freya, Odin agreed. According to Mimir, the truth is the 'sweaty bawbag' just got lucky.

When Thamur the Frost Giant Stonemason searching for his son, Hrimthur, Thor showed himself and killed Thamur by felling to his very own chisel as well took credits for the stonemason crushing and freezing the entire village famed worshiping the Vanir God, Njörd. ~ Mimir when revealing Thor killed Thamur. Thor always took credit planning that one, but the truth is the sweaty bawbag just got lucky. He has good term with his brother, Baldur and trusted him despite they have differences.

Thor is loyal to his family such his father, Odin. Thor 'befriended' the Jotunn warrior Aurvandil, and asked him for help in a quest in Vanaheim, just to intentionally kill him. Thor eagerly agreed to the task and laid waste to the Giants despite Freya's protests. Having grown paranoid about Ragnarök and determined to prevent it at any cost, Odin ordered Thor to use Mjolnir's power to annihilate the Giant race in the foolish belief that, without the giants, Ragnarok would not occur. He was shown to have a violent, brutal, and destructive nature about him, one that his father Odin capitalized on when he had Dwarven brothers make for Thor a hammer named Mjolnir with which to kill all the giants. Little is known of Thor's history as yet, but he is the son of Odin and Fjörgyn, a Giant from Jötunheim.

God of war ragnarok thor