Norse Mythology

by Neil Gaiman

It is said that at Ragnarok, which is the end of the world, and only then, Surtr will leave his station.

Last of all they gave the two people they had made names: the man they called Ask, or Ash Tree; the woman they called Embla, or Elm.

Heimdall will blow the Gjallerhorn only once, at the end of all things, at Ragnarok.