Jörmungandr ['jœrmuŋgandr], mostly known as Jormundgand, Midgårdsormen, or World Serpent, is; in Norse mythology, a sea serpent, and the middle child of the giantessAngrboða and the god Loki. According to the Prose Edda, Odin took Loki's three children, Fenrisúlfr, Hel and Jörmungandr. He tossed Jörmungandr into the great ocean that encircles Midgard. The serpent grew so big that he was able to surround the Earth and grasp his own tail. When he lets go the world will end. As a result he earned the alternate name of the Midgard Serpent or World Serpent. Jörmungandr's arch enemy is the god Thor.
The major sources for myths about Jörmungandr are the Prose Edda, Húsdrápa, Hymiskviða, and Völuspá. Less important sources include kennings in skaldic poetry. For example in Þórsdrápa, faðir lögseims, "father of the sea-thread", is used as a kenning for Loki. There are also image stones from ancient times depicting the fishing encounter. There are three preserved myths detailing Thor's encounters with Jörmungandr:
Lifting the cat
Thor goes fishing for the Midgard Serpent in this picture from an 18th century Icelandic manuscript.
In one, Thor encounters the serpent, who is disguised as a colossal cat by the giant king Útgarða-Loki. As one of the tasks set by Útgarða-Loki, Thor must lift the cat; though he is unable to lift such a monstrous creature as Jörmungandr, he manages to lift it far enough that it lets go of the ground with one of its four feet. When Jörmungandr is revealed by Útgarða-Loki, the lifting is counted as an impressive deed.
[Thor's fishing trip
Another encounter came when Thor went fishing with the giant Hymir. When Hymir refused to provide Thor with bait, Thor struck the head off Hymir's largest ox to use as such. They rowed to a point where Hymir often sat and caught flat fish, where he drew up two whales. Thor demanded to go farther into the water, and did so despite Hymir's warnings. Thor then prepared a strong line and a large hook, which Jörmungandr bit. Thor pulled the serpent from the water, whereupon the two faced one another, Jörmungandr dribbling poison and blood. Hymir went pale with fear, and as Thor grabbed his hammer to kill the serpent, the giant cut the line, leaving the serpent to sink beneath the waves. This encounter seems to have been the most popular motif in Norse art. Four picture stones can be definitely linked with the myth.
The final battle
The last meeting between the serpent and Thor is predicted to occur at RagnarökRagnarök(the norse vertion of the apocolipse), when Jörmungandr will come out of the ocean and poison the sky. Thor will kill Jörmungandr and then walk nine paces before falling dead, having been poisoned by the serpent's venom. Modern usageIn Tomb Raider: Underworld, Jörmungandr is revealed to be the network of tectonic ridges encircling the Earth, and a machine built in the likeness of the serpent and designed to bring about Ragnarök stands on its weakest point.In the PC game StarCraft by Blizzard, Jormangund is one of the randomly generated names for a computer-controlled team of Zerg.In the MMORPGWorld of Warcraft, also by Blizzard, Jörmungandr are burrowing worms found on the arctic continent of Northrend. They are said to be Children of Loken, the Warcraft Universe's version of Loki The Tampa, Florida Viking Metal band Jormundgandr uses Jörmungandr as the band's name. They also have a song dedicated to Jörmungandr, called Jormundgandr; Son of Loki, whichis about the battle between Thor and Jörmungandr at Ragnarök