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Warning! This page contains spoilers for The Sword of Summer.

Tanngrisnir (pronounced "TAN-gr-IS-neer"), commonly referred to as Marvin in the Magnus Chase and the Gods of Asgard series, is a goat that is owned by the Norse god Thor.

Magnus Chase and the Gods of Asgard

The Sword of Summer

Marvin and his brother Otis are commonly sacrificed by the god Thor and are reborn a short time after. When Otis brings Magnus, Sam and Hearth for help Marvin scolds Otis for taking so long and threatens to kill the demigods if they do not save Thor before saying 'nice to meet you'. After Thor is saved Hearth and the demigods eat the goats. He later pulls Thor's chariot to Gerriod's palace.


  • Marvin's real name, Tanngrisnr, means snarler, since he does so quite often.
  • Marvin is annoyed by the fact that he gets sacrificed along with his brother every single time.
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