Brett tunneled around the underground. This Earth Hound's sense of smell may not be as keen as that of Yellow Dog, but it is nevertheless a skill that was unique to him.
This was especially so with Brett's mythical metal body; he was much more sensitive towards the scent of Heaven and Earth's Vitality. His body was, after all, almost entirely made by Heaven and Earth.
He sensed a minimal amount of Vitality flowing towards a certain direction and very quickly found something strange.
There were numerous thin strands of Vitality Flow appearing in the air. These Vitality Flows were absorbing the Vitality on the entire Earth and directing them underground to be accumulated at an unknown spot.
He tracked the direction of the flow and came to a place that was somewhat familiar.
The Underground Greater Rat Kingdom. It was so brightly lit that is looked just like daytime, a city that never sleeps.