The Ocean Demon City was bustling with visitors nowadays and this made the atmosphere of the duke city very lively.
As for its reason, it was all because the Ocean Demon Duke announced forming a team of his duchy for the upcoming Demon Gate Trial. He invited every heroic youth from his duchy to Ocean Demon City.
If this was all, then there might be some ambitious tribes who'll choose the path of going alone and hoard all the benefits without sharing them with anyone, but now they can't.
Because of the Blade Demon King's decree about training every youth who was eligible for this trial in his domain and he'll even bestow resources on promising youths.
Everyone knows about Blade Demon King's reputation, so no one doubted his words.
That was why everyone chose to send their participants toward the King Demon and let them train under King Domain's experts, and this will also increase their chances of passing the trail tremendously.