Become a powerful person of shadow in the new world

"I want to become a powerful person of shadow."
Sid, who was born in an ordinary real world with this dream, was reborn in a different world, only to find that this world was too peaceful.
Just when I thought I would never be able to become a true shadow warrior, the world changed dramatically.
Demons, vampires, angels, and gods appear one after another in this new world.
"Listen, the world is cheering for the birth of a person with the power of shadow."
Shadow said so.
ps: Internet picture on cover, infringement will be deleted