After hearing this, the glare in the eyes of the Heavenly Demon General intensified, and a terrifying aura burst forth from him, nearly halting Su Xing's breathing.
Just a few breaths later, the Heavenly Demon General reined in his imposing aura, his lips curling up as he said,
"It so happens that I, too, have mastered the Dao of Slaughter!"
"The process of mastering the Dao of Slaughter... was far more arduous for me than it was for you!"
"I had ventured alone into the Outer Realm, battling for a thousand years before finally shaping the Dao of Slaughter!"
"Afterward, I spent three thousand years cultivating my nature until I had truly mastered this power..."
"Unlike you, young fellow, who mastered such power just from one battle and a fainting spell of about a month, even I am envious of that!"
He paused for a moment before advising,
"In the next several decades, you should stay within Heavenly Demon City and cultivate your spirit."