Black Light Gu

Fang Yuan goes after Liu tribe’s jade light pit because Attitude Gu needs huge numbers of flowing light fruits, and intense light among those fruits forms more fruit. Inside the pit he finds all sorts of light Gu, including colored light Gu such as blue light Gu, red light Gu, and black light Gu, with dazzling light Gu among them as well. ^{ch. 1209}

At the jade light pit

The text groups black light Gu with jade light Gu, reflect light Gu, borrow light Gu, return light Gu, and other light Gu in that resource point. In ancient sword dragon form he tears a defensive Gu formation that has no Immortal Gu, then takes countless Gu worms into his immortal aperture while Liu Luo hides. After he leaves, she tells Liu Chang that not a single Gu worm remains. ^{ch. 1209}