Qin Feng guessed it right. They were now in the center region of the continent. This was probably the route that led up to the dragon's brain, where the Immortal's crystal core was placed at.
Since they were on the inside, the energy level was much more abundant than other places on this continent. As a result, the specters roamed this place wherever darkness went. Highly dangerous creatures, like the giant monster with sharp claws from before, would also emerge here during the night.
It took a toll on those below SS-tiers to even move a step in here. Even the SS-tiers could hardly reap any benefits if they were to explore the cave unprepared.
However, high risk often comes with high rewards. More dragon blood that Qin Feng had obtained outside could be abundant here. There were also dark stones and dragon marrow hidden somewhere in here.