Chapter 648 - The Determination
Sam the next day went to the danger zone after informing everyone. Even though the human king and all the other people were very worried about him, they still cannot stop him from Breaking through. But you have to say after hearing that he wanted to break through the human Prince and Maria became more determined to become stronger.
Compared to Maria the human Prince became more determined that people he will try to break through he needed to reach the limit of his peak Epic grade. He understands that Sam most likely already reached the limit and only after that he decided to break through.
Reaching the limit not only depends on absorbing the spirit crystals. It also depends on the training and through training you need to reach the limit of that grade. As you know except Sam every Warrior needed to channel The Spiritual energy through training in their whole body to make their body more stronger and more powerful.