The legend of Ragnarok describes a cataclysmic event in Norse mythology that signifies the end of the world and the death of many gods, including Odin and Thor. It involves a series of battles, natural disasters, and the eventual submersion of the Earth into water. Following this chaos, the myth foretells a rebirth of the world, where surviving gods and two human survivors repopulate the Earth. Ragnarok illustrates themes of fate and renewal.