Corpse venomous insects were usually only used once and thrown away after they were used. As for the Corpse Controlling Technique of the Sorcerer God Sect, after the child venomous insect resided in the corpse, it would fuse with the corpse. Moreover, the child venomous insect would become stronger as the mother venomous insect became stronger, and the corpse would also become stronger.
Corpse Gu worms were usually only used once and thrown away after they were used up. After the child Gu worm resided in the corpse, it would not fuse with the corpse. However, the Witch God Sect's Corpse Controlling Technique allowed the child Gu worm to fuse with the corpse after it resided in the corpse. Moreover, the child Gu worm would become stronger as the mother Gu worm became stronger. Correspondingly, the corpse would become stronger and stronger.
Corpse Gu worms were usually only used once and thrown away after they were used up. According to the Sorcerer God Sect's Corpse Controlling Technique, after the child Gu worm resided in the corpse, it would fuse with the corpse. The child Gu worm would become stronger as the mother Gu worm became stronger, and correspondingly, the corpse would become stronger and stronger.
The mother gu of the corpse gu gave birth to the child gu to host the corpse. The host could use the mother gu to influence the child gu to control the corpse. It was different from the Sorcerer God Sect's corpse control technique. The corpse gu would be thrown away after being used up once. The child gu hosting the corpse was similar to possessing the body. It would retain the ability and qi of the deceased when they were alive, depending on the Gu master's cultivation. The side effect was that the host had a necrophobia, and in the later stages, the number of child Gu would increase. It could retain a portion of the remnant soul to make the puppet more agile, and the master's will could descend on the undeads. However, Corpse Venomous Insects were most particular about accumulation and foundation. A Rank-3 living corpse might require several generations of accumulation.