Invisibility Gu

On San Cha Mountain, Li Xian watches the Tie clan barrier around Bai Ning Bing while relying on this Gu. He treats it as the reason he will not be exposed by onlookers. ^{ch. 354}

Rank and detection

Gu worms at rank five are rare, and many rank five Gu Masters hold only one or two for years. Li Xian holds Invisibility Gu while still at rank four, from his own fortuitous encounters. ^{ch. 354}

Invisibility Gu can only be detected by specific rank five investigative Gu. Early in the three kings inheritance, with no one yet through the middle rounds, Li Xian judges rank five Gu Masters unlikely to move and expose him. ^{ch. 354}