Kami no gyakuten:The yamato hero - Chapter 14: Cave of Seiryu Clan

Wu Lai was an ordinary high school student. One day he was struck by a flash of lightning from a different world, and suddenly entered a fantastic world full of magic and swords. Since then, he started a totally new life. In this supernatural world, he had his ups and downs, experienced numerous battles, subdued powerful evil beasts, and fell in love with a belle. His nickname “Demon King” was remembered throughout the ages there.

Stay or return was a question. In the face of this choice, Wu Lai, with the nostalgia and gratefulness for the original world, finally chose to stay…

Here was the legend of “Demon King”…

- Description from Novelupdates

Strength: 1Agility: 1Stamina: 1Magic Power: 20Luck: 1All my stats are dumped into Magic Power.I can only use one spell.There’s no character as broken as this, and yet, that’s me.And somehow, I got mistaken for a once-in-a-lifetime genius.

The Yanhuang Ancient Domain, vast without end, gave birth to many Celestials and Demons of antiquity tore Heaven and Earth apart and surpassed the control of the 3 Realms and 5 Elements over the endless years it has existed. Numerous Gods, more than ten thousand races, and humans born with a God class body have also come out from the Domain, traveling through the nether, warping Yin and Yang, omnipotent.

He was promised a world of magic, dragons, and swords.What he got was a hijacked system, and a realm ruled by cultivators who crush mountains with a punch.