After the tailor came to take his measurements, Northern spent two days indoors before his uniform arrived, and he was eventually ready for his first day of school.
During those two days, he kept himself busy with two important tasks.
The first was meditation. Now that two entirely different entities resided in his body, he wanted to ensure he had—if not complete control—at least some understanding of them.
Hence, he meditated repeatedly, not trying to control or direct the flow of Chaos and Void.
In fact, these two entities had different flows. He didn't notice the Void essence flowing within his veins at all.
This led him to an amazing discovery: he was packed with such an endless amount of Void essence that it needn't flow.
Usually, the flow of essence in the body is directed through meditation and cultivated by a specific, tailored style to help the drifter achieve several results.