Just like with this "Lanruo Cottage," if you normally proceed inside, the boss you'll encounter is the Alien Species "Chang Tree Demon."
Defeating the Chang Tree Demon means you've essentially cleared the ruins here.
Afterwards, everyone can choose to exit the ruins at any time, or wait until the incense burns out and be automatically ejected by the ruins.
But if you want to challenge the hidden boss, luck won't cut it; you must have the corresponding [Trigger Item] to break that separation and unleash the hidden boss.
As the strongest monster that can appear in the dungeon, the materials that might drop from killing the hidden boss, such as Erosion Crystals, are naturally of high value, and [Trigger Items] are hard to come by.
