Myth about the ultimate destruction of the gods in a battle with evil WordNet 3.0 & Open English WordNet

In Norse mythology, Ragnarök is a foretold series of impending events, including a great battle in which numerous great Norse mythological figures will perish ; it will entail a catastrophic series of natural disasters, including the burning of the world, and culminate in the submersion of the world underwater. Wikipedia

Series of events in Norse mythology resulting in the fiery destruction and fertile rebirth of the world. Wikipedia Disambiguation

End times in Norse mythology Wikidata

A series of future events culminating in a battle, fought between the Æsir and einherjar on one side and the forces of Surt, Loki, and Loki's children on the other, in which all of creation is burned down and almost all life is extinguished. Wiktionary

The final battle in Norse mythology. Wiktionary (translation)