Su Mo was not worried when he saw the expert of the Netherworld Devil Sect disappear into the river.
Su Mo knew the expert had entered the river to either hide or escape from him.
After all, the river was big enough to hide his aura, which made it difficult for Su Mo to pursue him.
Su Mo immediately sped up towards the river bank in pursuit of the expert.
Su Mo jumped into the river without hesitation after a light laugh.
The river was hundreds of miles in width and was of unknown length as well as about three thousand meters depth.
Su Mo entered the river and found the tracks left by the expert before he arrived at the river bottom.
The expert had been very cautious. Instead of hiding somewhere on the river bed, he had walked quickly away from danger. At that point, he was already 20,000 miles away but had not managed to escape Su Mo's Martial Soul.