Charles was standing on the deck of the Narwhale and was staring at the bustling and prosperous Colossal Hole Fortress in the distance.0

The Colossal Hole Fortress was no longer just a fortress; it could already be considered a small city.0

An endless stream of floating airships moved to and fro from the fortress as if they were elevators that operated both day and night. The airships took turns bringing up supplies provided by all islands throughout the Subterranean Sea.0

A few amphibious vessels could be seen shuttling between the cars that were coming in and coming out of the fortress. As the number of factories on the fortress increased, the quality of the explorers' equipment was becoming increasingly higher as well.0

The Haikors were amidst the people in the fortress, and it was easy to spot them as they were quite tall. Moreover, they were riding carriages that were suitable...0