Joshua spent over three hours to guide Black in adapting its new human body.
That was actually a very normal thing. A dragon that has never experience walking with a pair of legs would not be able to immediately adapt to the function of the human body. Black also did not possess any Legacy memory of it.
During that three hours, the warrior went through hell guiding Black. Finally, he managed to bring Black into mastering the art of walking and running. Black could also jump a little without falling to the ground after some practice. She could also speak a sentence or two in the human language. However, every time she was not focused enough, she would still fall flat on her face.
