Magnus Chase NINE WORLDS Target
The Sword of Summer

Yggdrasil (pronounced "IG-druh-sill") is an immense tree that is in connection to which the nine worlds exist.

The gods go to Yggdrasil daily to assemble at their things. The branches of Yggdrasil 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 Ratatosk.


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

  • Asgard - world of the Aesir tribe of gods and goddesses
  • Vanaheim - world of the Vanir tribe of gods and goddesses
  • Muspellheim - primordial world of fire and the Fire Giants.
  • Helheim - world of the eponymous goddess Hel and the dead.


  • 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 | Mallory Keen | Samirah al-Abbas | Sumarbrander | Thomas Jefferson Jr.
Minor Characters: Annabeth Chase | Frederick Chase | Gunilla | Randolph Chase
Norse Gods: Freya | Frey | Thor | Loki | Odin | Frigg | Ullr | Vidar | Heimdall | Sif
Minor Gods: Hel | Mimir | Ran | Aegir
Jotnar: Surt | Utgard-Loki | Ymir
Monsters: Ratatosk | Jormungand | Fenris