Chapter 1:Damned Lich

Charles Grant was really just another gamer shut-in, or a NEET as some would call it. However, after getting to the end of Elder Scrolls II: Daggerfall, the Underking warns him of the changing timeline of the future due to the Dragon Break, that will cause an unforeseen calamity which will shake Tamriel to it's core. With Charles as the second coming of the Underking, the lich that worked in the shadows of the empire holding it upright for centuries, it is up to him to decide whether to let Tamriel rise or fall.

And yes, this is definitely an Isekai