C2550 An Unbreakable Formation

Why didn't the Poison Demon destroy the pool?

Because they couldn't do it.

The array protecting the pond was very high level. The Poison Demon Faction couldn't see through it, but they couldn't destroy it either, so they could only stay here.

After all, they could see through the array. Then it would be easy to crack it.

"Yin Sect's Formation Dao strength is unparalleled