Demon Sun Yukun once battled Wang Yan at Mozi Academy, but ultimately lost to Wang Yan's Lifebound Skill, and only by sacrificing his legs did he manage to save his life.
He could barely escape back to the Great Qin Empire, returning to Xianyang City, and after spending countless elixirs, he restored his destroyed legs.
For revenge, Demon Sun Yukun was willing to surrender his soul to Ying Zheng, becoming his loyal slave, guided by Ying Zheng, he finally broke through and achieved the cultivation of Demon Venerable Great Perfection.
Although his soul is incomplete, he will never be able to condense a Nascent Soul in this life, with the highest cultivation likely reaching only Demigod.
For someone as proud as Demon Sun Yukun, being limited to Demigod cultivation was already the greatest punishment.
Yet, for revenge, Demon Sun Yukun endured everything.
What he was waiting for was a day like today, the day of revenge.
