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Yggdrasil (pronounced "IG-druh-sill"), also known as the World Tree, is an immense tree that serves as the connection between the Nine Worlds and it is where the gods go to assemble their things. Yggdrasil's branches extend far into the heavens, and the tree is supported by three roots that extend far away into other locations. There are also creatures that live within Yggdrasil.

Magnus Chase and the Gods of Asgard

The Sword of Summer

Magnus Chase, Samirah al-Abbas, Blitzen, and Hearthstone climb the World Tree to get to Nidavelliar, but Magnus and Blitz are separated from Sam and Hearth when they run into the squirrel Ratatoskr.

9 from the Nine Worlds

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in The Sword of Summer, Magnus described Yggdrasil's smallest branches being as large as an average redwood, while the biggest ones being wider than Interstate 93. As for the tree's trunk, it is so immense, that it just didn’t compute with Magnus. Each crevice in its surface seems to lead to a different one of the Nine Worlds, "as if someone had wrapped tree bark around a column of television monitors glowing with a million different movies."

Beyond the tree’s canopy nothing but a hazy white glow of the primordial Ginnungagap mist can be seen. No ground can be seen below either, only more branches crisscrossing the void.

The Nine Worlds

  • Midgard - The world of humanity.
  • Asgard - Home of the Æsir tribe of gods and goddesses.
  • Vanaheim - Home to the Vanir tribe of gods and goddesses.
  • Jotunheim - Home to the jotnar.
  • Niflheim - Primordial world of ice and home to the frost jotnar.
  • Muspellheim - Primordial world of fire and home to the fire jotnar.
  • Alfheim - World of the Elves.
  • Nidavellir - World of the Dwarves.
  • Helheim - Realm of the eponymous goddess Hel and the dishonored dead.


  • Yggdrasil's roots extend into three locations:
    • Urðarbrunnr (ON: “Well of Urðr”)[1], Hvergelmir (ONr: “bubbling" or "boiling spring”), and Mímisbrunnr (ON: “Well of Mímir”). As seen in the Poetic Edda poem, Grímnismál, various creatures dwell within the World Tree, including:
    • Níðhöggr, a massive dragon/serpentine creature that gnaws at its roots, an unnamed eagle, the hawk Veðrfölnir, who sits between the eagle's eyes, and the four stags Dáinn, Dvalinn, Duneyrr, and Duraþrór.
  • The three Norns - Urðr (ON: “fate”), Verðandi (ON: possibly “happening” or “present”), and Skuld (ON: possibly “debt” or “future”) - attend to Yggdrasil, weaving the fates of both gods and men.
  • The Maya have their own world tree called Ceiba (pronounced "SAY-bah").[2]
  • The Hindu counterpart of Yggdrasil is Kalpavriksha, the tree from the Ocean of Milk that grants wishes.[3]
  • The story of Jack and the Beanstalk was inspired by Yggdrasil.


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.
Minor Characters: Annabeth Chase | Frederick Chase | Randolph Chase | Natalie Chase | Helgi | Hunding | Gunilla | Junior | Lars Alhstrom | Amir Fadlan | Alderman | Inge | Percy Jackson | Stan | Alviss | Miles
Norse Gods: Freya | Thor | Balder | Ullr | Frey | Odin | Heimdall | Vidar | Sif | Frigg | Tyr
Minor Gods: Skírnir | Norns | Mimir | Ran | Hel | Sigyn | Aegir | Nine Billow Maidens | Njord | Holler | Snotra | Forseti | Glum | Lofn
Jotnar: Surt | Utgard-Loki | Harald | Ymir | Geirrod | Gjalp | Greip | Thrym | Thrynga | Tiny | Little Billy | Hrungnir | Red | Tattoo | Gunlod | Suttung | Baugi | Skadi | Hrym | Eggther
Monsters: Jormungand | Ratatosk | Vedrfolnir | Nidhogg | Fenris Wolf | Lindworm | Wight | Brunnmigi | Siersgrunnr | Garm
Magical Creatures: Dwarf | Elf | Sleipnir | Stanley | Marvin | Otis | Jotunn | Hulder | Nøkks | Vatnavaettir | Nisser | Troll
Related Content: Rick Riordan | Hotel Valhalla Guide to the Norse Worlds | 9 from the Nine Worlds
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