In Norse mythology, Ragnarok (properly spelled Ragnarök, Ragnarøkkr, Ragnarøk) was the end of the world, doomsday. It would involve a final battle between the Æsir (Norse gods) and the Einherjar (mortals who died gloriously during battle) and a coalition of villains (the Fire Giants, the Jotuns, Loki, and miscellaneous monsters). This conflict would kill virtually all of the gods, the giants, and the monsters, not to mention tearing apart the whole universe (Yggdrasil, the World Tree, and all Nine Worlds). The matchups of this battle have been extensively detailed in several epics. All of the gods know this event will occur and whom will be killed by whom, but they know there is absolutely nothing they can do to stop it. It is a bleak fate, but all the gods have reconciled with that gloomy fact. Ragnarok differs from the End Times in Christianity in that both sides are slaughtered almost entirely (Christianity has God's forces triumph victorious over Satan's forces).