Stone Aperture Gu is a one use rank three Gu that turns an aperture wall into rock, squeezes out all remaining potential, and raises cultivation to the peak stage of the current rank.
Fang Yuan recognizes Stone Aperture Gu on Bai Ning Bing, refines it, and keeps it. ch. 143
Appearance
It is like a dice: cubic, grey white, and extremely sturdy. ch. 144 When Fang Yuan later detonates it, the same square dice form is grey and firm before it becomes grey powder that pervades the primeval sea. ch. 187
Effect
It is an expenditure Gu, gone after one use. It turns a Gu Master’s aperture wall into a sturdy rock wall, fully squeezes the aperture’s potential and growth, and lets the Gu Master reach peak stage of the current rank at once. The price is loss of the path to the next rank and loss of natural primeval essence regeneration, so only primeval stones can refill essence. Gu Masters use it when an aperture is cracked beyond recovery, or when they have no hope of advancing and need a fast peak stage to survive. Refining cost is very high. ch. 144
Bai Ning Bing’s intent
Fang Yuan judges that Bai Ning Bing refined it to convert the aperture into a stone aperture and delay Northern Dark Ice Soul physique death, and that the method can only delay destruction, not stop it. At that time Fang Yuan finds the Gu useless to himself compared with the Relic Gu and Water Shield Gu taken from the same body. ch. 144
Fang Yuan’s use
Under Spring Autumn Cicada pressure he detonates Stone Aperture Gu. Grey powder sticks to the light membrane aperture wall, thickens it into heavy stone, and jumps his cultivation from rank three initial stage light silver essence to rank three peak stage snow silver essence. He accepts the cut advancement route and the firmer stone walls as temporary support against Spring Autumn Cicada, and notes Ten Extreme Aptitude apertures recover even from stone, unlike his case. ch. 187
Blood Skull clash
Blood Skull Gu is rank four while Stone Aperture Gu is rank three. When Blood Skull Gu raises aperture potential, it rules over the stone effect, turns the aperture from stone back to light, and the cultivation gain from the stone aperture disappears and even falls. ch. 198 Later narration groups Relic Gu and Stone Aperture Gu among Gu that reduce the time needed to raise cultivation. ch. 217 Fang Yuan later recalls paying a disastrous price of future prospects when he used stone aperture Gu on Qing Mao mountain to reach rank three peak stage. ch. 312
Chronicle
Connections(14)
0 later connections are veiled.