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A 17th century Icelandic manuscript depicting Ratatoskr. Although unexplained in the manuscript and not otherwise attested, in this image Ratatoskr bears a horn or tusk.

In Norse mythology, Ratatoskr (Old Norse, generally considered to mean "drill-tooth"[1] or "bore-tooth"[2]) is a squirrel who runs up and down the world tree Yggdrasil to carry messages between the eagles perched atop Yggdrasil, and the serpent Níðhöggr, who dwells beneath one of the three roots of the tree. Ratatoskr is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda, written in the 13th century by Snorri Sturluson.


The name Ratatoskr contains two elements: rata- and -toskr. The element toskr is generally held to mean "tusk". Guðbrandur Vigfússon theorized that the rati- element means "the traveller". He says that the name of the legendary drill Rati may feature the same term. According to Vigfússon, Ratatoskr means "tusk the traveller" or "the climber tusk."[3]

Sophus Bugge theorized that the name Ratatoskr is a loanword from Old English meaning "Rat-tooth." Bugge's basis hinges on the fact that the -toskr element of the compound does not appear anywhere else in Old Norse. Bugge proposed that the -toskr element is a reformation of the Old English word tūsc (Old Frisian tusk) and, in turn, that the element Rata- represents Old English ræt ("rat").[4]

According to Albert Sturtevant, "[as] far as the element Rata- is concerned, Bugge's hypothesis has no valid foundation in view of the fact that the [Old Norse] word Rata (gen. form of Rati*) is used in Háv[amál] (106, 1) to signify the instrument which Odin employed for boring his way through the rocks in quest of the poet's mead [...]" and that "Rati* must then be considered a native [Old Norse] word meaning "The Borer, Gnawer" [...]".[4]

Sturtevant says that Bugge's theory regarding the element -toskr may appear to be supported by the fact that the word does not appear elsewhere in Old Norse. However, Sturtevant says that the Old Norse proper name Tunne (derived from Proto-Norse *Tunþē) refers to "a person who is characterized as having some peculiar sort of tooth" and theorizes a Proto-Germanic form of -toskr. Sturtevant concludes that "the fact that the [Old Norse] word occurs only in the name Rata-toskr is no valid evidence against this assumption, for there are many [Old Norse] hapax legomena of native origin, as is attested by the equivalents in the Mod[ern] Scandinavian dialects."[5] Modern scholars have accepted this etymology, listing the name Ratatoskr as meaning "drill-tooth" (Jesse Byock, Andy Orchard, Rudolf Simek[1]) or "bore-tooth" (John Lindow[2]).


A red squirrel in an evergreen tree in Norway

In the Poetic Edda poem Grímnismál, the god Odin (disguised as Grímnir) says that Ratatoskr runs up and down Yggdrasil bringing messages between the eagle perched atop it and Níðhöggr below it:

Benjamin Thorpe translation:
Ratatösk is the squirrel named, who has run
in Yggdrasil's ash;
he from above the eagle's words must carry,
and beneath the Nidhögg repeat.[6]
Henry Adams Bellows translation:
Ratatosk is the squirrel who there shall run
On the ash-tree Yggdrasil;
From above the words of the eagle he bears,
And tells them to Nithhogg beneath.[7]

Ratatoskr is described in the Prose Edda's Gylfaginning's chapter 16, in which High states that

An eagle sits at the top of the ash, and it has knowledge of many things. Between its eyes sits the hawk called Vedrfolnir [...]. The squirrel called Ratatosk [...] runs up and down the ash. He tells slanderous gossip, provoking the eagle and Nidhogg.[8]


According to Rudolf Simek, "the squirrel probably only represents an embellishing detail to the mythological picture of the world-ash in Grímnismál".[9] Hilda Ellis Davidson, describing the world tree, states the squirrel is said to gnaw at it—furthering a continual destruction and re-growth cycle, and posits the tree symbolizes ever-changing existence.[10] John Lindow points out that Yggdrasil is described as rotting on one side and as being chewed on by four harts and Níðhöggr, and that, according to the account in Gylfaginning, it also bears verbal hostility in the fauna it supports. Lindow adds that "in the sagas, a person who helps stir up or keep feuds alive by ferrying words of malice between the participants is seldom one of high status, which may explain the assignment of this role in the mythology to a relatively insignificant animal".[2]

Richard W. Thorington Jr. and Katie Ferrell theorize that "the role of Ratatosk probably derived from the habit of European tree squirrels (Sciurus vulgaris) to give a scolding alarm call in response to danger. It takes little imagination for you to think that the squirrel is saying nasty things about you."[11]

In popular culture[edit]

Books and comics[edit]

Ratatoskr appears in his natural habitat in American Gods by Neil Gaiman.

In the comic book series The Unbeatable Squirrel Girl, Ratatoskr is featured as a villainous female squirrel god from Asgard who wants to destroy all of humanity.[12] She was defeated by Squirrel Girl after she teamed up with Thor and Loki.[13][14] However, she later teamed up with Squirrel Girl to fight the Frost Giants.[15][16]

Ratatosk appears in the novel Hellboy: The Bones of Giants (2001) by Christopher Golden.

Ratatosk appears in Walter Simonson's Ragnarok comic, which takes place in an alternate mythos in which the forces of evil won the final battle.

In the novel Hammered, Atticus rides Ratatoskr to the top of Yggdrasil on his quest to steal the golden apples of Iðunn.

Ratatosk is referenced in Larry Niven's novel Rainbow Mars. Plans were made to capture a giant squirrel that ran up and down the World Tree (Yggdrasil). Although called "Batatosk" in the story, it is clearly referring to the mythical creature Ratatosk.

Video games[edit]

A fragment of Ratatoskr, nicknamed “Bitter” and voiced by Troy Baker, appears in the 2018 video game God of War, where he has the ability to provide the player with healing items.[17] The actual Ratatoskr appears in the 2022 sequel, God of War Ragnarök (alongside Bitter), tending to the world tree Yggdrasil; this version of the character is voiced by SungWon Cho.[18]

He also appears as a playable character in the game Smite.[19]

In the 2010 video game Young Thor, Ratatoskr is depicted as an ally of Hel, who serves as the game's antagonist.[20][21]

Ratatoskr also appears in the 2020 video game Assassin's Creed Valhalla, where he engages the player in flyting, a poetic duel, in the mythical realm of Jötunheimr.

Ratatoskr can be cast as the spell "Ratatoskr's Spin," as of 2019, in the video game Wizard101, where he climbs down the world tree, digging up a giant acorn and damaging all enemies with it.

Ratatosk is the name of the Summon Spirit of Monsters in Tales of Symphonia: Dawn of the New World, though his role is quite a bit different from Norse myth. He is responsible for managing the distribution of mana through the world (via monsters). He resides in Ginnungagap, and also acts as the guardian of the gate to Niflheim. Much of the story of the game is centered around him.

Ratatoskr is a recurring enemy in the video game La-Mulana 2. He is first found at the roots of the tree of Yggdrasil near Níðhöggr (stylized in-game as Nídhogg) and, later in the game, can be found near Veðrfölnir (stylized in-game as Vedfolnir). He plays a prominent role both in both gameplay and plot, and his appearances culminate into a boss battle which occurs in Hel (location) and opens the pathway to fight Hel (mythological being).

Ratatosk appears as the name of a cave system in the video game Guild Wars 2.[22] In that context, the name may also be punning on the numerous "Rata-" cities such as "Rata Sum" and "Rata Novus", which instead derive their names from Latin.

Ratatoskr appears in the video game, Jotun, where it spends its life carrying messages between Vethrfolnir and an unnamed eagle who are perched at the top of the World Tree, Yggdrasil, and Nidhogg, the dragon that lives in the roots of the tree. Ratatoskr is massive, being many times the size of a human, and can be spotted a few times in the Vethrfolnir's Perch level, scurrying up and down the trunk of Yggdrasil.


The Ratatosk Express is the name given to the train in The Mechanisms' album, 'The Bifrost Incident', which is the setting for the majority of the events in the album.[23]

Ratatoskr appears in the trading card game Magic: The Gathering as 'Toski, Bearer of Secrets'; a homage to the mythical creature. The card's effects connote Toski's tenacity to exchange information between the many realms of Kaldheim.


  1. ^ a b Orchard (1997:129), Simek (2007:261), and Byock (2005:173).
  2. ^ a b c Lindow (2001:259).
  3. ^ Guðbrandur (1874:483).
  4. ^ a b Sturtevant (1956:111).
  5. ^ Sturtevant (1956:111–112).
  6. ^ Thorpe (1907:23).
  7. ^ Bellows (1936:97).
  8. ^ Byock (2005:26).
  9. ^ Simek (2007:261).
  10. ^ Davidson (1993:68–69).
  11. ^ Thorington Jr. and Ferrel (2006:142).
  12. ^ Beard, Jim (June 10, 2019). "Didja Know... Ratatoskr, the Giant Horned Asgardian Squirrel God". Marvel.com. Retrieved September 13, 2020.
  13. ^ The Unbeatable Squirrel Girl #1-8
  14. ^ Wickline, Dan (September 9, 2017). "The Unbeatable Squirrel Girl Gets The Marvel TL;DR Treatment". Bleeding Cool. Retrieved September 13, 2020.
  15. ^ Terror, Jude (July 9, 2019). "Can a Frost Giant Diet Win the War of the Realms? Unbeatable Squirrel Girl #46 Preview". Bleeding Cool. Retrieved September 13, 2020.
  16. ^ Matter, Britany (February 14, 2019). "'Unbeatable Squirrel Girl' Joins the 'War of the Realms' Action". Marvel.com. Retrieved September 13, 2020.
  17. ^ Guida, Matthew (May 4, 2018). "15 Hidden Secrets Only True Fans Noticed In God Of War". Screen Rant. Retrieved September 13, 2020.
  18. ^ Cho, SungWon (September 10, 2021). "I voice and provide the motion capture for Ratatoskr in GOD OF WAR RAGNAROK, and in addition, I was also hired by @SonySantaMonica to work directly with the writers to help write his scenes, thank you to everyone there for the opportunity". Twitter. Retrieved 2021-09-10.
  19. ^ Fahey, Mike (May 18, 2015). "Smite's Squirrel God Is Appropriately Nuts". Kotaku. Retrieved September 13, 2020.
  20. ^ "Young Thor". GamesIndustry.biz. November 23, 2010. Retrieved September 30, 2020.
  21. ^ Christopher, Rick (November 23, 2010). "Young Thor Review (PS Mini)". Gamers Daily news. Archived from the original on December 2, 2020. Retrieved September 30, 2020.
  22. ^ Ratatosk: GW2 Wiki
  23. ^ The Mechanisms (29 January 2017). "Black Box". bandcamp. Archived from the original on 18 February 2022. Retrieved 28 February 2022.


External links[edit]

  • Media related to Ratatoskr at Wikimedia Commons