Arifureta Shokugyou de Sekai Saikyou (WN) - Chapter 366: Arifureta After IV Demon King & Hero Arc Fort City Coltran

The first great emperor in the world was betrayed by his confidante and perished. Millions of years later, the great emperor’s soul returned and was reborn as Ye Yan, the son-in-law who was kicked out by the Chu family with a letter of divorce, restarting the supreme journey. Open the gate of immortality, kill the Jiuzhongtian, and cast an invincible name again!

- Description from novelbuddy

Being in the World of Arknights...Thing's are going to change drastically and...You best be ready for what's to come ahead.

Orlax Tirshtain is the villain in the global game [Unification of Empires]. The tyrannical, cold-blooded emperor is a man who slaughtered his own family with his own hands and ascended the throne with their blood—a power-obsessed madman. Despite five years having passed since the game’s release, no one has been able to defeat this lunatic. So, how the hell did I become this damned?????

He is an undead who is devoid of all humanity, he is the one and only supreme overlord, he is a man who has severe mysophobia.