Originally posted by HangarPilot:

I don't understand this decision at all. I haven't experienced it yet, but supposedly "they sought you out" can happen anytime after defeating Yagluth ... meaning BEFORE you even have a chance to upgrade your base.

Defeating the mistlands boss should prevent both of the new invasions from occurring. I only had two invasions in 100 days or so until I felled the boss, one of which was the gjall event and it was literally just one gjall. Events can also only occur every 46 minutes, with 20% chance, not "anytime".

Stone is available as early as defeating Eikthyr. You can lay stone wall blocks partially clipped into each other to make what is essentially double stone wall in the same space (takes a ton of stone though). Additionally, you can create wooden or iron layers, or a structure of walls which funnel enemies into a maze of sorts where they are slowed down. If you have upgraded your defenses in case of troll or fuling invasions, you're already halfway there.