On this page of Assassin's Creed Valhalla guide, you will find the description of the ending of the Asgard storyline.
Eivor (Havi) manages to defeat the mighty Fenrir and tie him with Gleipnir, an unbreakable rope. The son of Loki, though defeated and chained, loses none of his confidence and threatens all members of the Isu with death.
The Norns send Eivor (Havi) a vision of what is coming. The goddesses pronounce that, despite all his efforts, the bonds of destiny bind him as tightly as ever and foretell the doom of the Isu and Wans - Ragnarok.
Havi, however, comes up with a way to avoid the annihilation and cheat death. Together with other gods accompanying him, they drink mead to send a part of themselves to the Yggdrasil tree of life and have a chance of later reincarnation in the distant future. Then, they boldly set out to face their death. They are later reborn as:
- Eivor - Odin;
- Sigurd - Tyr;
- Basim - Loki.