While walking through the wide footpath, heading for the dormitory, his mind was occupied with thoughts of their field trip. Apparently, the trip was a vacation in one of the biggest Blue Gate dungeons in Manhattan, a dungeon called the Undead Desert.
Unlike Green Gate Dungeons, which were famous for being dangerous due to the fact that no one could leave once they entered, and most people only entered by mistake, Blue Gate Dungeons were pocket dimensions. Some were as big as cities, others as vast as regions.
The Undead Desert was said to be as large as one of the biggest deserts on Earth.
Because of this, and the fact that the creatures within respawned after a certain time limit, Blue Gate Dungeons became an unlimited resource for the authorities and guilds.
