The TV series "The Last Immortal" is becoming more and more thrilling. As the story unfolds, the most heart-wrenching plot is about to unfold. Without a doubt, the most tragic moment in the series is when A Yin is killed by Gu Jin using the Soul Sword. Gu Jin is the direct perpetrator, while Hua Shu is the indirect one. A Yin is killed by the Nine Heavens Profound Thunder unleashed by Gu Jin using the Soul Sword, causing his soul to scatter. Fortunately, prior to this, A Yin had formed a positive relationship with two powerful figures in the Netherworld.

The reason why Xiu Yan needs half of A Yin's inner core energy is mainly because during the battle between gods and demons, Xiu Yan used the Breakthrough Method to seal the demon lord Ming Qi. It was this Breakthrough Method that caused his inner core to shatter. O Ge pleaded with the ancient (Yihe) to use the power of chaos to resurrect Xiu Yan within himself, resulting in the twins becoming a fused soul later on. O Ge wanted his younger brother to live, so he did everything he could to help Xiu Yan.

Moreover, the demon lord Ming Qi is the first Chaos Supreme God and is even more powerful than Yihe and Emperor Xuan, two true gods. With his strength, it wouldn't be difficult for him to escape the Nine Abyss Purgatory. However, he chose to remain there and observe the events unfolding in the Three Realms. He seemed uninterested in invading the Divine Realm, especially considering that the Ancient Divine Realm is now closed, and Xiu Yan and O Ge cannot do anything to him. Besides, Emperor Xuan has not yet been resurrected. So why doesn't Ming Qi take the opportunity to repeat history and invade the Divine Realm like he did seventy thousand years ago?

The reason why the demon lord Ming Qi hasn't invaded the Divine Realm is not because he cannot leave the Nine Abyss Purgatory, nor because he fears the true god Yihe, but because of an unparalleled existence: the Ancestor God Qing Tian. In the battle between gods and demons seventy thousand years ago, it wasn't just Xiu Yan who made a move. In "Eternal Jade Dust," we can see that it was Bai Jue who used the Divine Artifact, the Sky Bow, to kill the trapped demon lord Xuan Yi, who is Ming Qi. In theory, Xuan Yi should be dead, so why did he reappear in the world?

The reason is simple: just like Emperor Xuan, it was the Ancestor God who resurrected him. The reason why he was fixated on attacking the Divine Realm is that he was originally the ruler of the Divine Realm. He left the Divine Realm because of the Chaos Tribulation. After the Chaos Tribulation passed, he decided to attack the Divine Realm. After his failure, he died a miserable death. Fortunately, the Ancestor God resurrected him, and he repented, becoming less radical and ambitious.

Of course, fundamentally speaking, he desires chaos in the Three Realms. Otherwise, he wouldn't have given the Demon Lord Qing Lin a portion of his divine power to control the God-slaying Flower, nor would there have been subsequent events. The Ancestor God once said that demons are born to be practiced by immortals, which is why he watches indifferently and turns a blind eye. When he saw Yuan Qi using the power of chaos to restore the barrier of the Nine Abyss Purgatory and witnessed his miserable death, he unexpectedly saved Yuan Qi and resurrected him, perhaps repaying the favor to the Ancestor God.

In conclusion, he did not return to the Divine Realm. For him, he simply wanted to prove that all beings are equal and that the Ancestor God was wrong. But because the Ancestor God resurrected him, he did not take advantage of the vulnerability of the Divine Realm. As for whether he will continue to remain hidden or subvert the Three Realms in the future, only time will tell.