In Norse mythology, Surtr or Surt (Old Norse “black” or “the swarthy one”) is an eldjötunn.
Surtr 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. In both sources, Surtr is foretold as being a major figure during the events of Ragnarök; carrying his bright sword, he will go to battle against the Æsir, he will do battle with the major god Freyr, and afterward the flames that he brings forth will engulf the Earth.
In a poem from the Poetic Edda, Surtr is described as having a female companion, Sinmara. In a book from the Prose Edda additional information is given about Surtr, including that he is stationed guarding the frontier of the fiery realm Múspell, that he will lead “Múspell’s sons” to Ragnarök, and that he will defeat Freyr.
Surtr has been the subject of place names and artistic depictions, and scholarly theories have been proposed about elements of Surtr’s descriptions and his potential origins.
Surtr is mentioned twice in the poem Völuspá, where a völva divulges information to the god Odin. The völva says that, during Ragnarök, Surtr will come from the south with flames, carrying a very bright sword:
Sutr ferr sunnan
með sviga lævi:
skinn af sverði
Surtr moves from the south
with the scathe of branches:
there shines from his sword
the sun of Gods of the Slain.
Following this, the völva says that “stone peaks clash”, “troll wives take to the road”, “warriors tread the path from Hel”, and the heavens “break apart”.
The next stanza relates that Odin is to be killed by the wolf Fenrir, and that Surtr will go to battle against the god Freyr. No further detail is given about the fight between Surtr and Freyr in the poem.
In the stanzas that follow, a number of gods and their opponents are described as doing battle at Ragnarök, and that the world will be consumed in flames, yet afterward the world will resurface anew and fertile, and the surviving gods will meet again.
In the poem Vafþrúðnismál, the wise jötunn Vafþrúðnir poses the question to Odin (disguised as “Gagnráðr”) “what the plain is called where in battle Surt and the sweet gods will meet”. Odin responds that the “ordained field” is Vígríðr, and that it stretches “a hundred leagues” in every direction.
Later in the poem, Odin, still disguised and now questioning Vafþrúðnir, asks which of the Æsir will “rule over the possessions of the gods when Surt’s fire is slaked”. Vafþrúðnir responds that, “when Surt’s fire is slaked” the god Thor’s sons Móði and Magni shall possess Thor’s hammer Mjöllnir.
In the poem Fáfnismál, the hero Sigurd asks the mortally wounded dragon Fáfnir the name of the island where Surtr and the Æsir “will mingle sword-liquid together”. Fáfnir says that the island is called Óskópnir, that all of the gods shall go there bearing spears, and that on their way there the bridge Bifröst will break beneath them, causing their horses to “flounder in the great river”.
In the poem Fjölsvinnsmál Surtr is mentioned as having a female companion named Sinmara.
In chapter 4 of the Prose Edda book Gylfaginning, the enthroned figure of Third tells Gangleri (described as King Gylfi in disguise) about the location of Múspell. Third says that the bright and flaming region of Múspell existed prior to Niflheim, and it is impassable to those not native to the region. To defend Múspell, Surtr is stationed at its frontier.
Third adds that Surtr has a flaming sword, and that “at the end of the world he will go and wage war and defeat all the gods and burn the whole world with fire”. The stanza from Völuspá that foretells Surtr moving from the south is then quoted.
In chapter 51 of Gylfaginning, High describes the events of Ragnarök. High says that “amid this turmoil the sky will open and from it will ride the sons of Muspell. Surt will ride in front, and both before and behind him there will be burning fire. His sword will be very fine. Light will shine from it more brightly than from the sun.”
High continues that when the sons of Múspell ride over the bridge Bifröst it will break, and that they will continue to the field of Vígríðr. The wolf Fenrir and the Midgard Serpent will also arrive there. By then, Loki will have arrived with “all of Hel’s people”, Hrym, and all of the frost jötnar; “but Muspell’s sons will have their own battle array; it will be very bright”.
Further into the chapter, High describes that a fierce battle will erupt between these forces and the Æsir, and that during this, Surtr and Freyr will engage in battle “and there will be a harsh conflict before Freyr falls”.
As foretold by High further into chapter 51 Gylfaginning, Once Heimdallr and Loki fight (and mutually kill one another), Surtr “will fling fire over the earth burn the whole world”.
High quotes ten stanzas from Völuspá in support, and then proceeds to describe the rebirth and new fertility of the reborn world, and the survivors of Ragnarök, including various gods and the two humans named Líf and Lífthrasir that will have hid from “Surtr’s fire” in the wood Hoddmímis holt.
Scholar Andy Orchard theorizes that the description of Surtr found in Gylfaginning “appears to owe something to biblical and patristic notions of the angel with a flaming sword who expelled Adam and Eve from paradise and who stand guard over the Garden of Eden.”