[4] In the Poetic Edda poem Vafþrúðnismál, the god Odin, disguised as "Gagnráðr" faces off with the wise jötunn Vafþrúðnir in a battle of wits.
[6] In the Poetic Edda poem Fáfnismál, the dying wyrm Fáfnir is asked by the hero Sigurd what the name of the island is where Surtr and the gods will battle is called.
[7] In the Prose Edda book Gylfaginning, the enthroned figure of High foretells the events of Ragnarök.
Odin, wearing a golden helmet, a coat of mail, and brandishing his spear Gungnir, will ride in the front.
Loki and Heimdallr will kill one another and, after their death, Surtr will spray fire over the earth and burn the entire world.