Before S3W2, it seems I would find a basement every 5 or 6 zones while farming for wood or stones. Now that I have a task to do in a basement, I just can’t find one. I must have entered 20+ zones in the last 3 days (12 so far today, watching ads and burning gas, back and forth between green and yellow stones), but I haven’t find a basement yet. Any tips or trick to spawn one? Or is it just luck based?