Dimensional Tower [1]

About three months after the calamity, during one of the guild's expeditions, they stumbled upon a towering structure near the site of the rift that had been tackled by the Imperial Army under Albert Constantine's command.

The main guild sent out multiple scouting missions to thoroughly survey the area. When the scouts returned, they delivered unexpected and rather shocking information that immediately caught the army's attention.

That the tower's first floor was akin to another dimension. It was an entire landscape with its own life, filled with creatures they had never seen before.

At least, up til that point.

They were already familiar with these creatures, as they belonged to the same species as the monsters that dominated the continent, where humanity no longer had control of.