Why is it in this place?
Well, the ancestor of the Veinu Kingdom was a necromancer in the past. He hid his things and the undead he controlled in a special place. So after he died, the undead became powerless for several decades. They grew stronger and right now they reached the limit.
They appeared on Lerna Island causing a rampage everywhere.
Also, the appearance of the special environment made the undead more powerful. If it not for this, the locals of Lerna Island would be enough to exterminate the undead.
Souta glanced at his surrounding. Corpses of prisoners were scattered around.
No one would have thought that the ancestor would choose a place like this as a passage to his secret hideout.
"A good one..."
Souta flicked his fingers and fireballs were launched into the sky. He was in the underground but he set everything up. It's time for Yuko and Yenxa to help Eztein deal with those undead.