Sam018

I've been playing this game for quite a while and in the past I would always time my cave diving and mining around when the rift activity was calm or low because there would be less or no monster spawns. I'm playing the game today and the rift activity is calm but there are monsters spawning under the trees near my base and they're in the caverns everywhere. Is this normal? Did I just have really good luck before? Or has something changed?