Iron Mountain.

Shi Lang looked at the different spirit vessels flying in the void. He did not care about how the Elders were shocked by his words. Elder San was surprised but then he said, "Xiao Lang, you are underestimating the three families a bit too much. They are closed off completely. Even beasts that are not bred in their own fields are not allowed in how can they allow a human?" 

Shi Lang shook his head and replied, "Elder San, people do not build walls around their houses to keep the others out, but they make them to keep themselves safe. These big families all follow hierarchy. If you can find the weakest link in this chain, then you only need to strengthen that link. Your link will work for you. Wars are not only fought with your own tools. As long as you see the enemy as a tool, it will work."