439 Master.

Yang Dao sat on the back of the black turtle with his eyes closed. He was aware of what the laws of the time were. What he needed now was to get an understanding of the laws of space. The space was not as time. 

He did not have any tips that might help him. As he sat in meditation, he realized his folly. He scolded himself for being too overconfident and pretending that he can do it all when he posed in front of Atsuji Kurogame as he said, "See you later." 

At this moment suddenly something clicked in his mind. A thought flashed in his mind. He thought, 'The mind of a human is boundless space as well. However, it has the power to contain all the knowledge in such a tiny space. So, suppose that the wide space around us is also a container that contains it all within itself...'