In Norse mythology, Ragnarök ( RAG-nə-rok or RAHG-; Old Norse: Ragnarǫk [ˈrɑɣnɑˌrɒk]) is a foretold series of impending events, including a great battle in which numerous great Norse mythological figures will perish (including the gods Odin, Thor, Týr, Freyr, Heimdall, and Loki); it will entail a catastrophic series of natural disasters, including the burning of the world, and culminate in the submersion of the world underwater.
https://en.wikipedia.org/wiki/Ragnar%C3%B6k