Originally posted by OctoberSky:

The wiki[valheim.fandom.com] has updated information on this event. Yes, they will attack when you kill Yagluth and yes they eat stone fortifications so those very secure Meadows fortresses we built need marble to withstand the attacks.

I understand it works this way but imo it shouldn't, those raids should happen when you already proven your self in the biome...
Anyway, this is big factor for me that prefvents me to play to just chill, and cook and gradening in my base, because now i can't chill untill i get like 2000 marble...

I will discuss it with my friend to start a new world, and don't kill the bosses, because this is just absurd imo.