Gan Liu had followed Tian Jizi, and by virtue of being constantly by his side, he had heard about far more matters than even Tian Jizi's own disciples.
After Tian Jizi cultivated the Sound Worms, he found that if they parasitized an animal or a person's body, they could strengthen its physical form, surviving by consuming the host's nutrients.
To avoid overbreeding of the Sound Worms, their growth could be controlled by musical rhythms. This meant that even with Sound Worms inside a living body, as long as the controller did not act, the worms would not emerge from their cocoons, allowing both humans and animals to coexist.
However, the Tiger Army lying before them was different; its corpses contained at least hundreds of Sound Worms. These worms would rapidly change the hosts' physique, enhancing their constitution, but due to the overwhelming number of worms, the Tiger Army had lost its will, only obeying the musical rhythm.
