This first task isn't very complicated. The difficulty of the first island lies in the mist. The mist not only affects vision but also impacts a Master's judgment on details, and even when encountering danger, the presence of mist can delay reactions.
But for Jiang Chen, these are not issues.
He has honed the Five Senses and Six Intuitions, excelling in every aspect. His God's Eye isn't affected by darkness, and the layers of mist have little effect on his vision.
Within the mist, Jiang Chen fully utilized his God's Eye, enveloping the surroundings with his Divine Sense to begin searching for the Silver Chain Gate.
Logically, this Silver Chain Gate must be located in a very hidden place. Otherwise, it wouldn't be considered the key task for the first Forbidden Island.
Jiang Chen chose not to deploy the Goldbiter Rats nor to use the powers of the Vermilion Bird Divine Bird and Long Xiaoxuan. He decided to rely on his own strength to find the Silver Chain Gate.