Jörmungandr (or Jormungand) is a child of the god Loki. After the capture of her father, she was thrown into the great ocean sourrounding Midgard. Unfortunately, she found enough food to survive without being eaten by anything. And so she grew larger and larger, being now long enough to encircle Midgard and grasp his own tail. Therefor she was also called Midgard Serpent.
Of course, a monster of such a size has not many natural enemies. The only known threat to her are thunder gods. Thor encounters her twice. The first meeting was on a fishing trip with the giant Hymir. Thor caught her with a bull's head as bait and beat her with his terrible hammer. It would have been the last encounter if the frightened Hymir hadnt cut the line of Thor's rod, freeing the monster.
The strange thing is the fact that Thor had never in mind to do this a godd deed for the Aesir. He just wanted to impress Hymir who had questioned his strength. So after he saw how the giant caught two whales, he decided to make a REALLY big catch.
The next time the snake and the thunder god will face each other will be at Ragnarok. This time Thor won't be stopped by any scared spectator, but after slaying the beast, he will suffer a painful death in her poison.
Another addition to my pack. This time an 'evil' creature. Before demanding more detail, please note that this snake is 40,075.16 kilometres (24,901.5 mi) long

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Keywords:
Jormungand, Snake, World Serpent, Norse, Viking, Scroll, Rune