Six headed snake bones

A Gu Immortal finds a six headed snake dead body and sells its parts and organs separately in treasure yellow heaven. The six headed snake is a desolate beast with strength comparable to rank six Gu Immortals; its whole body is a treasure and every part can be used in Gu refinement. With no black blood left on the century-dead carcass, Fang Yuan still buys the whole skeleton for three immortal essence stones, because the bone marrow can produce blood and he knows how to extract it. ^{ch. 682}

In Hu Immortal blessed land’s western blood pool, the six headed snake’s skeleton bobs while a Gu formation consumes it to create black blood, with rank five Battle Bone Wheel as the core. ^{ch. 682}

Two days later the six headed snake’s large skeleton has completely melted in the blood pool, and Fang Yuan obtains a great amount of black blood from it. ^{ch. 683}

The six headed snake’s bones have turned into black blood and been fed to Calamity Beckoning Immortal Gu. ^{ch. 709}

Fang Yuan later recalls that buying a six headed snake’s skeleton had cost only three immortal essence stones, when weighing another four-stone expense. ^{ch. 712}