Training

After the lieutenant left, Ning was taught all he could possibly learn in a single day by Berraine. It was more of the dos and donts of a Converter, and how one should manage oneself.

Especially given Ning's importance to humanity, he couldn't push himself too hard, or else he would break himself. 

"Do not consume more Spark than your body can handle. Too much spark and you can destroy your body in such a way that you become Sparkless. It has happened too many times before, so you have to be careful."

"Whenever converting something, always make sure that you know exactly what it is that you are converting something into. Have a proper image in your mind, or at least an understanding of it. Any wasted Spark is something that could've been used for something better."