Through the Soul Gathering Pearl, Shi Yan felt signs of an extremely powerful life force from the bottom of the mine.
From his understanding of life force, he can be sure that the powerful life force came from a black scaled demon dweller, who was at least at the Second Sky of the Nirvana realm.
The black scaled demon dweller who was in the Second Sky of the Nirvana realm was definitely a frightening existence in the Black Rock Island.
Although Lin Nan has the same Nirvana realm cultivation, through the battle with the demon dwellers, Shi Yan was absolutely sure that in the same realm, a black scale demon dweller was absolutely more powerful than a human warrior.
In other words, Lin Nan certainly wasn't that demon dweller's opponent.
The higher the realm that a demon dweller had, the greater the risk was when passing through the unstable points in space. Maybe when this demon dweller came to the Endless Sea, he was injured and just recovered recently.