Bi Mountain Demon Cavern, a Heaven Outside Cave? Mo Hua and Gu Changhuai exchanged glances. "The Bi Mountain Demon Cavern, does it mean that here, in Bishan City, there is a demon's cave where sin cultivators and evil cultivators reside?" "And 'Heaven Outside Cave' refers to the location of this demon's cave, a place outside the heavens, a world unto itself?" Mo Hua silently pondered. "Bi Mountain Demon Cavern..." Gu Changhuai's gaze also became gradually sharp. Mo Hua silently muttered to himself again, his confusion apparent. Bishan City is an immortal city, bustling with cultivators coming and going, and even the Taoist Court is stationed here; where would a "demon's cave" come from? Is this demon's cave a large-scale stronghold for the Demon Sect? Or is it just a temporary dwelling for sin cultivators and evil cultivators? What exactly is hidden inside? Is the Fire Buddha hiding in this demon's cave right now? Unable to figure it out, Mo Hua leaned close to Gu Changhuai and asked in a low voice, "Uncle Gu, have you heard of this 'Bi Mountain Demon Cavern'?" Gu Changhuai's expression turned solemn, and he shook his head. The Taoist Court had never received any clues about this so-called "Bi Mountain Demon Cavern." And under the watch of the Taoist Court within Bishan City, where could a "demon's cave" possibly have been built? However, Jia Ren was captured unexpectedly, his storage bag was secretly hidden, and the letter token was still sealed. The text inside should be authentic. Mo Hua frowned in thought, then his eyes lit up slightly. Gu Changhuai looked at him with some surprise. "Have you thought of something else?" Mo Hua nodded; he quickly sorted through his thoughts and then asked, "Uncle Gu, after the Xie family was annihilated, the Fire Buddha and his followers, in full view of all the cultivators in Bishan City, just vanished in the flames..." "How did they disappear?" "Could it be..." Mo Hua proposed a bold guess, "... teleportation?" Gu Changhuai was taken aback and then shook his head. "No. Teleportation involves the power of space, which is divine skill of the Fifth Grade Heaven Void Realm. This is the Second Grade State Border; the laws of Heavenly Dao prevent teleportation..." Mo Hua had expected as much. But after all, his knowledge of Dao cultivation is limited, and he wasn't very clear about the unreachable cultivation and divine skills of the Fifth Grade Heaven Void, so he thought it best to confirm with Uncle Gu. At least to eliminate the possibility of "spatial teleportation." But Mo Hua was puzzled about something. The power of space is an ability of the Heaven Void Realm ancestors, and the Heavenly Dao restricts it to the Fifth Grade. But the storage bag, possessing its own space, also contains the power of space, doesn't it? Then why can storage bags be used in lower Second Grade state boundaries? Mo Hua posed the question to Gu Changhuai. Gu Changhuai was somewhat surprised. These matters were not secrets among the great families and clans. But seeing Mo Hua's puzzled face, it was clear he genuinely didn't understand. Gu Changhuai felt a strange sense of balance in his heart. So this young man also has things he doesn't understand... Gu Changhuai's eyebrows rose slightly as he uncommonly explained with patience, "Storage bags are inanimate objects, their space power is objective, only capable of holding lifeless things." "Whereas the space power of the Fifth Grade can be subjectively controlled by cultivators, it can also accommodate living 'creatures,' enabling void instant movement or teleportation..." Mo Hua suddenly understood, then he asked again, "How are storage bags made then? Do they involve formations?" Gu Changhuai shook his head, "Storage bags don't involve formations..." "Or to put it more accurately, they don't involve Fifth Grade space formations. Even if there are formations involved, they are only ordinary ones for reinforcement, beautification, dust removal, and concealing aura..." "These formations are common, not involving the power of space." "The space power of the storage bag is composed of 'silkworm threads'..." Mo Hua was startled, "Silkworm threads?" Gu Changhuai casually pulled out a storage bag from the ground, tore the opening, and showed the fine threads along the opening. "Storage bags are woven from silkworm threads." "The threads come from the 'Green Void Silkworm,' which inherently contains the power of space. The threads they spin naturally carry additional space." "Using special artifact refining techniques to weave these threads into a storage bag, it naturally comes with extra space." "So I said, the space of a storage bag is dead, it objectively exists..." "I see..." Mo Hua nodded in understanding, then said, "Then these 'Green Void Silkworms,' since they contain the power of space, must be very expensive..." "Not really expensive..." Mo Hua was surprised, "Containing the power of space, and yet not expensive..." Gu Changhuai said, "Yes, the expensive ones are the 'Golden Void Silkworms' and 'Star Void Silkworms,' those ancient space silkworm breeds." "Golden Void Silkworm? Star Void Silkworm?" Mo Hua had never heard of them, looking somewhat bewildered. Gu Changhuai internally felt much more at ease and continued, "In ancient times, spiritual artifacts and magical treasures capable of containing objects were extremely rare." "Because the cultivation of these spiritual artifacts required silkworm breeds that were born with powerful spatial power, which were difficult to catch, breed, and the silk they produced was also very scarce." "With rare ancient silkworm breeds, the number of spatial artifacts refined was also limited." "However, despite being few in number, these ancient 'treasures' were of very high quality." "Invariably, they were made from the threads, cocoons, or pupae of the most superior and precious space silkworm breeds, thus they are treasures of Dao cultivation. The interior space was naturally very large." "They were true treasures with a world in a pouch, a cosmos in a ring..." "With the development of the cultivation world and the proliferation of cultivators, the demand for space spiritual artifacts has also surged dramatically."