Undefeated Hundred Battles Gu

He later treats it as part of the essence of the three kings inheritance: if he can obtain that essence, the San Cha trip would succeed and his strength would jump for the battle of Yi Tian mountain. ^{ch. 365}

While fighting, Century Boy thinks that Fang Yuan’s all-out effort Gu is still rank three and cannot summon the beast phantoms. Those rank four phantoms cannot be summoned at will unless Fang Yuan obtains this Gu from King Xin inheritance and raises all-out effort Gu to rank four. ^{ch. 368}

Fang Yuan tells Feng Tian Yu to continue charging through the rounds and to bring him the copy in King Xin inheritance. In his previous-life memories, he was the one who obtained it. After rebirth he wants both the Gu and the original owner as a subordinate. ^{ch. 387}

Feng Tian Yu kneels and offers a Gu worm. It is nothing special in appearance, looking like a round piece of limestone. After going through the hundredth round and receiving King Xin Inheritance, Feng Tian Yu also takes in several hundred hairy men who stand beside him. ^{ch. 389}

Fang Yuan sends Chou Jiu to King Xin Inheritance for the Gu. Chou Jiu is a healing Gu Master, not a refinement path master, so taking it is easy once Gu worms become usable again as the blessed land weakens. The Gu has a bland appearance, like a grey stone disc. In Fang Yuan’s previous life, Feng Tian Yu obtained King Xin Inheritance with several hundred hairy men. This time Chou Jiu breaks through by force, gets only this Gu, and brings no hairy men. Fang Yuan keeps it in the dark; Bai Ning Bing does not learn of it. ^{ch. 401}

During the public refinement he takes out a Gu with a plain appearance like a grey stone disc. It is a rank five expenditure Gu: once used, it allows a Gu Master’s refinement to succeed for sure. He uses it, the Immortal Gu’s aura stabilizes, and a green butterfly flies out, Fixed Immortal Travel. ^{ch. 405}