A concealing Gu worm is a Gu used to hide a Gu Master's aura. Without one, a rank two aura cannot be concealed from the clan.
After Fang Yuan breaks through to rank two, he takes the initiative to reveal that breakthrough when he returns to the village gate. With no concealing Gu worm, he would not be able to conceal his rank two aura. ch. 97
Wild concealing type
During a fight with a stone monkey king, Fang Yuan realises a wild concealing-type Gu worm resides in that beast. He has no way to detect a concealing Gu worm and falls into disadvantage when the king hides again after a missed attack. ch. 115
Chronicle
Connections(3)
0 later connections are veiled.