While talking, the students got a little distracted. But they didn't forget to keep track of where they were. However, even if they got lost, they still left a trail of monster corpses they could follow.
Although the monsters in the forest were extra ferocious, it seemed they had trouble sensing each other due to the underworld energy everywhere. They were like bags of water among other bags of water in an ocean. There was no clear distinction between them all.
Deep in the forest, where the competition and fighting between the monsters had dwindled and there was no one to cull the population, there was an incredible amount of monsters. As if that wasn't enough, the students started encountering monsters that had adapted to the underworld energy.