Chen Xun was genuinely impressed this time. He returned the booklet to Black Bull, who finally let him off the hook.

Black Bull kept mooing and grumbling, clearly displeased with Chen Xun, who had never taken anything from him before.

Black Bull sulked against the cave wall, while Chen Xun continued to sense the strengthening mana within him.

He furrowed his brows slightly, raised one hand, and five multicolored streams of mana swirled around him. "This mana feels so dense, but this is just the first stage."