Nazarick's Duelist.

Momonga decided to remain on the Yydrasil servers till they went down only for something unexpected to happen, he was taken to a new world along with the Great Tomb of Nazarick.

But it's much different than you would expect, instead of a world full of magic and fantastic creatures of all kind roaming around.

He was instead summon to a world in the modern age. But the air was clean and you didn't require a mask to walk outside your own home.

But that doesn't mean Nazarick isn't by his side, for they have been transformed into cards which are used to play a game that is popular world wide in the new world, known as Duel Monsters.

And he isn't in his Skeletal Avatar but a younger 15 years old version of his real life self?

How with he deal with the Nazarick NPC's without the aid of his undead traits?

(Not every card is shown for the characters decks so I add some filler cards that fit their deck and who they are.)

I do not own either of the two
Overlord is written by Kugane Maruyama
Yu-Gi-Oh is owned by Konami