Su Yang, of course, did not believe it was merely a simple loop inside this place. The monster was trapped here but was prevented from moving deeper; there had to be a reason for that. Inside, there might be something crucial.
Moreover, Su Yang even suspected that the person who had originally sealed the monster here had done so precisely to use the creature as a guardian. With a monster guarding the place, ordinary people would have no means of entering it at all.
If that were the case, there might be other restrictions within this cave.
Since the person from the past could use such a monster to guard this place, they certainly possessed other abilities that allowed them to set up additional prohibitions.
But what kind of prohibition could make someone go in circles inside?