William sighed. He wanted Gloria to explain the two words but looking at the sofa, he noticed that she had fallen asleep. "Take care of her. She should wake up in six hours."
"Six hours?" Sienna asked in doubtful tone.
"Yes. When Yakov overexerted himself, he falls asleep for one hour and his ability increase afterwards. When I overexerted myself, I fall asleep for four hours and when Gloria did the same, she slept for six hours." William then thought about the time when Yakov said that his ability increased.
"This is just a conjecture but based on our experience, it feels as if our ability increased after we overexerted. We still don't know if it might have other effects, though but I did realize that my physical strength increase."