Idunn (pronounced "ee-done", in some versions Iduna) is the Norse Aesir goddess who acts as the keeper of apples that grant her fellow gods' eternal youthfulness.

Magnus Chase and the Gods of Asgard

The Sword of Summer

Magnus encounters a pigeon that tells him Samirah al-Abbas, Blitzen, and Hearthstone that he knows how to get the Sword of Summer, but he wants something in return: Idunn's apple of immortality. To get the apple, they will need to attract the sea goddess, Ran.


  • Her name is traditionally spelled Iðunn.
  • She is similar to the Greek Goddess of youth, Hebe.
  • Idunn Mons, a mons of the planet Venus, is named after Idunn.
  • The Swedish magazine Idun was named after the goddess; she appears with her basket of apples on its banner.
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