((Having moved to another world, fate decided that you will now be the lord of the dungeon, the first level as luck would have it))

you are standing in the middle of an average coniferous forest next to a hillock in which there is a hole, inside a square earthen room without anything measuring 5 by 5 wide and long and 2 meters high. And also a blue ball the size of a ball, this is the core of the dungeon and you should hide it! After all, the core of the dungeon is your heart!