Happy with his huge haul and the relatively low fuss of defeating the scorpions, Zero took his time to explore, map out the dungeon and make his way down to the lower floors. The dungeon didn't seem to move much and Zero was not convinced that it wasn't anything like Sleepy Cave that could alter its interior on will. If anything, the most this dungeon could do was repair itself when it was damaged and retain the souls within its domain for birthing new monsters to harvest mana from unsuspecting visitors looking to take shelter from the sweltering heat or sandstorm outside.
Yes, Zero found the actual entrance while exploring and conveyed that to Bob and Truen. It might be safer to set up camp closer to the entrance of the dungeon instead because the structure might collapse entirely once Zero defeated the final boss. Without monsters to birth new monsters, this dungeon was doomed forever if it couldn't replenish its mana on time.