This was one of the reasons why a recommendation was required to enter the Underground City—having a guide could help newcomers avoid many pitfalls.
"Consider today a lesson from me. Remember it well, and let the pain of this experience teach you not to trust strangers so easily. In this world, even your own parents and siblings may not be trustworthy." Lagan let out a sinister chuckle. "One more thing—information about the Holy Gate of the Heaven and Earth is indeed expensive, but it usually doesn't cost a hundred million. The only reason I quoted that price was because you two looked like newcomers. I never expected you to agree so quickly."
Since they had accepted without hesitation, it was only natural that he would exploit them to the fullest.
If these two could throw around a hundred million without blinking, they must be extraordinarily wealthy.