Warlock of Oceans: My Poseidon System - Chapter 7: Troll and New Class

After opening the ancient well in his backyard, Li Yin’s life has changed since then!

Sixth Prince Li Yin? 21st century otaku Li Yin? He can travel freely between the two worlds, what kind of life should he choose?

Harem? Hegemony? trickery? Is that all?

No! With the advantages of modern technology, he wants to build his fiefdom into the economic center of the world, and the world map will be filled with his colonies…

PS: This is written about the Tang Dynasty, but it is a parallel time and space. There is no need for historical burdens, and it will be a little different from the real Tang Dynasty. Please don’t be serious about the textual research party, because some small details like titles are annoying. This is not what I wanted, thank you!

- Description from novelbuddy

Cultivating his power by slaying demons and taming countless beasts, the emperor solidified his throne as the world's ruler. But not once in his life had he expected that his disciples would use research on demonology to sap the world tree's power and push the world to destruction.Trying to fix his mistake, he opted to use all of his cultivated power to cure the world tree and block anyone from sapping its power ever again. But in exchange, he was to lose all of his power.But...the worst had happened, his wife... had betrayed him.

Childhood sweethearts.
The most popular person in school is my childhood sweetheart.

- Description from Novelupdates

America, 1980. No sooner had Xu Yi transmigrated than he was put on the dissection table; then he gradually came to understand the true nature of this world. “Studying medicine can’t exorcise undead demons; I must become an exorcist!” he resolved silently to himself. On a misty, rain-soaked night. “Miss Evil Spirit over there, the night is cold and damp; be careful not to catch a chill! Come over here and warm yourself by the fire!” Xu Yi said, holding a lighter, as the pale gold flame slowly approached the other. The Evil Spirit shrank back, looking at Xu Yi with fear. “Don’t be afraid, I just want to warm you up...” Xu Yi’s face broke into a warm smile, “by setting you on fire!” Ding dong! Ding dong! “Sign-in at the Land of Fear successful, Resurrection Coin awarded!” “Synthesis pathway requirements met, do you wish to combine the following entries?” Psychic + Scholar + Painter = Psychic Painter! Saintly Offspring + Gunfight Technique + Revolver Mastery = Holy Gunslinger! Undead + Revelation + Holy Nation = God!