In Norse mythology, what is the final battle called?

In Norse mythology, the final battle is called Ragnarök, the foretold destruction and renewal of the divine and human worlds.

The Old Norse name Ragnarök is commonly interpreted as “fate of the gods,” though the related form Ragnarökkr has been understood as “twilight of the gods.” The events are described especially in the Poetic Edda poem Völuspá and Snorri Sturluson’s Prose Edda. Ragnarök is not just a single clash: it is a chain of disasters involving broken oaths, cosmic upheaval, and war between the gods and their enemies.

Before the battle comes Fimbulwinter, a terrible winter lasting three successive seasons with no intervening summer. Fenrir breaks free, Jörmungandr rises from the sea, and Surtr and the forces of chaos attack the gods. Odin is swallowed by Fenrir, Thor kills Jörmungandr but dies from its venom, and Surtr sets the world ablaze. Yet the myth also includes renewal: some gods survive, and Líf and Lífþrasir emerge to repopulate the world. The Aesir–Vanir War is an earlier conflict, not the final battle.