Versatile Mage's Magic Talent

[Decisive killing + cool writing + rigorous logic + filling in the gaps + completing forbidden spells and the emperor's combat power]
The protagonist Qin Chen participated in the rescue in Bo City, inherited the power of the ancient king in the ancient capital, and became the lord of Shayuan.
After the World Academy Competition, he led Sha Yuan to conquer the underworld, kill Khufu, and unify all undead forces on land.
When the Red Bone Demon Lord, one of the Eight Dead Kings, was captured in the Holy City and was heading to the Holy City, Qin Chen led Sha Yuan to attack the Holy City, killing two archangels and the Golden Holy Dragon, and shocking the world.
During the Demon City Sirens War, the protagonist completely resurrected the Azure Dragon, killed seven emperors, and defeated the Sirens.
However, due to Qinglong's complete resurrection, he was discovered by Qinglong's former enemy, Leviathan, the roof of the ocean. Leviathan then led the sirens to attack again, setting off a shocking war like the one in the Totem Era.
However, even if Qinglong was fully resurrected, his strength would be greatly reduced. He would only have the strength of a medium-level emperor and would no longer be able to compete with Leviathan, the roof of the ocean.
In the totem era, totems defeated the sirens, but all the holy totems were lost. Now it is the human era. Can humans successfully defend this coastal area in the east?
New book: "Pirates: From the Rocks Era to King of the World"