Originally posted by Cian:

You can actually use two worlds - kill the bosses in one and bring their trophies back to another. I did that just for fun after beating the game normally. I killed all the bosses a second time and stuck the trophies in a second world. In that world I have access to all the boss powers, but only get animal attacks at my base.

I do basically the same. One world for progressing, and one without boss-killing for having fun and building peacefully. The events CAN ruin your fun from time to time. And Fuling in Meadows can, too. It's just more logical that all the enemies stay in their own biome. I mean, what do you with Blackmetal after a certain point? Eat it? You can't even build arrow heads.

Yup. As you move through the game into new biomes and by completing the bosses, new mob raids can trigger. You can find charts and details online that break out what conditions can lead to which raids.

That combined with the recent "mobs aggro everything all the damn time" patch are probably what you're experiencing.

The game doesn't even look at your surrounding biomes to determine what attacks you. You can be on a tiny island that is nothing but Meadows and get raided by goblins as long as there is space for them to spawn. Or you could set up in the plains and get raided by nothing but animals if you haven't defeated any bosses in that world yet. It's solely dependent upon the triggers, most of which are dependent upon which bosses have been killed.

You can actually use two worlds - kill the bosses in one and bring their trophies back to another. I did that just for fun after beating the game normally. I killed all the bosses a second time and stuck the trophies in a second world. In that world I have access to all the boss powers, but only get animal attacks at my base.

but you already killed moder , thats the trigger for the goblin horde , killing yagluth cancels goblin raids but make normal fulings spawn at night everywhere

https://valheim.fandom.com/wiki/Events