What if they weren't trying to reproduce but instead the human face spider was trying to forcefully mutate or evolve?
Although it was only his thought, it made a lot of sense to him, after all, it was the only thing that was worth consuming their offspring, for a magical beast.
Albert kept quiet for a long time as he reviewed all the information he had collected and had been reported from Nick, and finally made their attack plan.
"Everyone tonight, we gathered some resources and then set an encampment near the entrance of the nest. After which early tomorrow at dawn, we go inside to explore and then clear the cave.
"We are going to cut their replenishment of food and diminish their numbers gradually to avoid being surrounded, this way we will be completely safe while still completing the mission. Get everything you might need, we depart in an hour."