Douluo Dragon King: I am the Holy Lord of the Abyss, the King of Eternal Night

[Dragon King Legend fanfiction, anti-third party, not pro-Tang dynasty, genius protagonist]
The abyss descends, soul beasts return, the Federation is unified, Shrek Academy and the Spirit Pagoda each occupy their own territory, and Tang Shenwang's grand plan for ten thousand years hangs in the balance.
At the moment of the Dragon King's final song, Jiang Xiu traveled to the Douluo Continent, awakened the Purple Emperor Annihilation Dragon Martial Soul, the ancestor of sub-dragons, and joined forces with the Dark Shadow King, the ruler of the Eternal Night.
But just as he was awakening, a sudden abyssal tide swept Jiang Xiu's shadow into the abyssal plane.
But this is precisely an opportunity for Jiang Xiu to break free from Tang Shenwang's grand plan of ten thousand years!
With a shout of "Stand up!", countless shadows of abyssal creatures slowly rose to their feet. Subtly and silently, the abyssal plane gradually changed its masters...
In the Douluo Continent, watch how Jiang Xiu enters the Federation, breaks through the Tang Sect, destroys Shrek Academy, and rebuilds the Spirit Pagoda.
Years later, when the Tang God King returned, a voice as loud as a bell rang out.
"Tang San, I've been waiting for you for a long time!"