Coral Island was the most important island among the overseas archipelagos of the Karte Continent.
Before the Giant Demon invasion, Coral Island was the only island within a radius of nearly a thousand nautical miles to possess a Nightmare Level Dungeon.
The Nightmare Level Dungeon had a total of ten floors.
Each floor corresponded to one level for Professionals, from Level 1 to Level 10.
Therefore, any region with a Nightmare Level Dungeon also had the potential to produce Saint Tier Professionals.
Before the Giant Demon invasion, there were a great many Adventurers here.
But after the Giant Demon invasion began, the Underground City was abandoned, and a large number of overseas Professionals traveled to the continent to provide support.
Eventually, many of the overseas cities were slowly abandoned.
And with the Nightmare Level Dungeon already having fallen into disuse due to the fall of the gods, it was naturally left abandoned for a long time.
