Apollo didn't notice her reaction, as he was completely absorbed in the mysteries of the ancient words and their profound application to the spirit. His spirit was already exceptionally strong, having broken the limit to become a first-rank limit-breaker, increasing his spirit ten or even a hundred times.
However, with this increased spirit, the difficulty of opening Mind Blocks also grew. It would have taken him one or two days to open his first Mind Block, but the sudden enlightenment allowed him to do so instantly.
As he opened his first Mind Block, he felt an immediate improvement in his spirit, which seemed to be purified and made more sturdy. Yet, this was only the beginning. Still immersed in the mysterious feeling, Apollo continued, and there was no sign of stopping.