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Jormungand (pronounced "YOUR-mun-gand"), also known as the World Serpent, is a sea serpent and child of Loki and Angrboða.


Jormungard was born to Loki and Angrboða along with Fenris Wolf and Hel. When Odin found out about their births, he tossed Jormungand into the great ocean that encircles Midgard.

The serpent grew so large that he was able to surround the earth and grasp his own tail. As a result, he received the name of the World Serpent. Jormungand's arch-enemy is the god Thor, destined to kill each other during Ragnarök.

Magnus Chase and the Gods of Asgard

The Sword of Summer

Magnus Chase and Samirah al-Abbas get Jormungand's attention (further intending to get the attention of Ran) by throwing a bull's head into the ocean. He threatens to completely wake up and destroy the world.


In The Sword of Summer, Jormungand is described as a gigantic serpent with his scaled hide glistening in a camouflage patchwork of green, brown and yellow. His ridged forehead and tapered snout make him look more like an eel than a snake, however. His eyes resemble huge green spotlights the size of trampolines, while his irises glow so intensely, that Magnus was certain that everything he saw for the rest of his life would be tinted the colour of lime jelly.

When Jormungand opened his mouth, the stench of serpent poison was so strong that Magnus' clothes smoked. The serpent's teeth gleamed in rows of perfect white triangles, with his pink maw being big enough to swallow Harald’s 20-foot-long boat and a dozen of Harald’s closest friends’ boats simultaneously.

Power and Abilities

  • Massive Strength: Due to his massive size, Jormungand is incredibly strong, enough to trade blows with Thor himself, who is stated to be one of the strongest norse gods. Ran stated that if Jormungand truly awakes, he will generate tsunamis and tidal waves big enough to destroy Boston.
  • Poison Generation: Jormungand is able to generate poison and spit it from his mouth. This poison is deadly enough to kill Thor.


  • During Ragnarök, the World Serpent is destined to be killed by Thor, yet his venom will also kill the latter shortly thereafter.
  • The way Jormungand bites his tail is similar to the Ouroboros. That is a symbol in Gnosticism representing the cycle of life, death, and rebirth.
  • His Greek counterpart is Keto.
  • His Egyptian equivalent is Naunet who is also depicted as a giant sea snake surrounding the world. Apophis was also shown as encircling the world at times.
  • His Mayan counterpart is Hapikern.
Magnus Chase and the Gods of Asgard
Core Series: The Sword of Summer | The Hammer of Thor | The Ship of the Dead
Main Characters: Magnus Chase | Alex Fierro | Blitzen | Halfborn Gunderson | Hearthstone | Loki | Mallory Keen | Samirah al-Abbas | Sumarbrander | Thomas Jefferson Jr.
Secondary Characters: Randolph Chase | Gunilla | Natalie Chase | Amir Fadlan | Alderman
Minor Characters: Annabeth Chase | Frederick Chase | Helgi | Hunding | Vala | Junior | Lars Alhstrom | Stanley | Inge | Percy Jackson | Stan | Alviss | Miles | Wildflower | Sunspot | John Henry
Norse Gods: Freya | Thor | Balder | Ullr | Frey | Odin | Heimdall | Vidar | Sif | Frigg | Tyr
Minor Gods: Skírnir | Mimir | Ran | Hod | Hel | Sigyn | Aegir | Nine Billow Maidens | Njord | Kvasir | Holler | Forseti | Glum | Lofn | Sól | Idunn
Jotnar: Surt | Gerd | Norns | Utgard-Loki | Harald | Ymir | Geirrod | Gjalp | Greip | Thrym | Thrynga | Tiny | Little Billy | Hrungnir | Red | Tattoo | Gunlod | Suttung | Baugi | Skadi | Hrym | Eggther | Norns
Monsters: Jormungand | Ratatosk | Vedrfolnir | Nidhogg | Fenris Wolf | Lindworm | Wight | Brunnmigi | Siersgrunnr | Garm
Magical Creatures: Dwarf | Elf | Sleipnir | Stanley | Marvin | Otis | Hulder | Nøkks | Vatnavaettir | Nisser | Troll | Raven | Hugin and Munin
Related Content: Rick Riordan | Hotel Valhalla Guide to the Norse Worlds | 9 from the Nine Worlds | Magnus Chase and the Gods of Asgard (Films)