Demonization is fake.
It was merely a tactic Ye Qiu used to deceive Di Shi Tian.
Ever since Ye Qiu was once controlled by murderous intent, to prevent it from happening again, he has reinforced his will several times, so he doesn't easily succumb to slaughter.
And the way he tempered himself was unique and mad — it was the previous four-day-and-three-night ordeal with lightning, the Heavenly Tribulation!
During such a prolonged ordeal, Ye Qiu experienced a Heavenly Tribulation unimaginable by anyone.
With Ye Qiu in it, to survive, he repeatedly almost died in the tribulation. Yet he held onto his conviction; he wanted to live, become a Dao Lord, and with this thought, avenge the people of Dan Shen Sect. He wouldn't allow himself to die, so he survived.
He achieved rebirth amidst the tribulation and advanced to the Dao Lord level.
To kill Di Shi Tian, Ye Qiu had planned in his mind how to deal with him long before setting out, and feigning demonization was one of the plans.
