Rule eye blood

At Qin Bai Sheng’s auction, a bidder offers a qi grand lion strength Gu plus five drops of rule eye blood. Onlookers name rule eye tribulation as one of the ten great catastrophes, and say the blood is obtained only by piercing the rule eye. They call it genuine immortal material that can serve as the main material for a rank six Immortal Gu or as a supplementary material for a rank seven Immortal Gu. Fang Yuan judges five drops precious but still too little for his bid choice. Heaven metal is later priced as an immortal material on par with rule eye blood. ^{ch. 752}

From the twenty-third secret room, another bid reports one iron crown eagle strength Immortal Gu plus fifteen drops of the immortal material rule eye blood. ^{ch. 759}