Expanding the Northern Reaches: Álfablót
by Marc SaindonPerhaps it's an important event in the Kalslo Island, different from the rest of Ostland, due to primarily worshipping Vanir instead of Aesir. Despite its secrecy maybe a watered-down version of the festival is celebrated throughout the Northern Reaches.
In a previous post, I've mentioned the possibility of (non-canon) indigenous Elves that live in the Northern Reaches, so maybe they could have a connection to the Alfablot rituals, perhaps it represents the sealing of an old peace pact between (human) Kalslo Islanders and these Elves.
(previous post on Elves
(pic from: https://sonsofvikings.com/blogs/history/alfablot-the-viking-halloween)