Billy was clearly in too much of a hurry. He blurted out, "It's a coincidence! Pure coincidence! Here—I'm not gonna take advantage of you for nothing. Take this book and study it. It'll give you a solid foundation in soul-related knowledge."

With that, Billy tossed a worn, coverless book onto the table and bolted like a madman, as if the Phaeron Codex might vanish if he did not get there in time.

Felix still had his doubts, but his curiosity shifted toward the book. He sat down, opened it, and began reading.

It did not take long for him to realize he had struck gold. The book's contents revealed the mysteries of the soul with stunning clarity, finally pulling him out of the dark.

"Wait... there are so many levels when it comes to the soul? Did I just jump straight to the higher ranks?"

With the successful formation of his Ethereal Constitution, his soul had already surpassed most who spent years training. Even those with natural talent would struggle to reach this stage so quickly