"Why not?" Shang asked.
"You see, we fill a huge hall with a lot of Mana and insert several Concepts. The Mana in the hall moves around in rapid waves, and the movement of the waves makes it easier to look at the primal forces. It's not that easy to explain to a non-Mage."
"Fact is, what you want to achieve is not the standard form of Void Casting. The most effective form of Void Casting is using a unique Mixed Concept comprised of Space, Time, and Gravity Concepts to achieve a compressive effect on the Mana around you."
"But that is only something that the Empires know. The Void Casting that people outside use is more primitive, where people just force Mana into a small space with their minds. What you are trying to do is more similar to this form of Void Casting, but we only teach the better version, which is the one exclusive to Empires."
