In chapter 42 of the Prose Edda book Gylfaginning, High tells a story set "right at the beginning of the gods' settlement, when the gods at established Midgard and built Val-Hall" about an unnamed builder who has offered to build a fortification for the gods that will keep out invaders in exchange for the goddess Freyja, the sun, and the moon.
Three myths are described in the twelve stanzas and half-stanzas of Úlfr's Húsdrápa: Baldr's funeral, Thor fishing for Jörmungandr, the Midgard serpent, and Heimdall's fight with Loki for the Brísingamen.
Jörmungandr, also known as the Midgard Serpent, is the serpent surrounding the Earth and grasping his own tail in Norse Mythology.