The Gu system actually had a lot of research value.
In many cases, some special Gus could be used to great effect.
Leng Maner's countless special Gus were such an example—she could take out suitable Gus in almost any situation.
The only pity was that raising Gus was too troublesome. They needed special feed, a special environment, a corresponding cultivation technique, and their lifespan was short.
Take the Shadow Concealment Gu in Zhou Feng's hand as an example. He could not provide it with a suitable environment and didn't have its feed.
It was already in a weakened state and would die in a few more days. After all, he did not have Leng Maner's Myriad Gu Goblet.
Nonetheless, it was already good enough that it could be of use for a few more days.
"Woof, woof, woof!"
Big Yellow sniffed around and barked three times.
