Overlord, Vol. 1 (Manga)

What do you do when your favorite game shuts down? Momonga decided to stay logged in right up until the very end. But when the servers go dark, he finds himself transported into the game world—and he's been transformed into his skeletal avatar from the game, awesome magical powers included! But what if he's the villain of his own story?

Volume 1 of the Overlord manga series by Kugane Maruyama.