Prelude to Apocalypse
The Guild Death Note is actually founded by the Dark Assassin player named Nightshade. He is an up-and-coming newbie that became well known after the Pandelympics. What is even interesting that not everyone knows is that he is also from another race in-game called the Taqriaqsuit.
The Taqriaqsuit are a being native to the Shadow World and are actually repulsed by the undead. They are a race that could also be called the Shadow People. They are a race that perfectly hides in the shadows due to it being their natural habitat and is actually the favorite creation of the God of the Moon, Igaluk.
The Taqriaqsuit are said to have been created using the shadow of the moon that Igaluk casts. Since the Taqriaqsuit are also a race that likes to live in peace, they turned to the Shadow World which is in the same plane of existence of the mortal realm but just slightly lower in frequency. It does not mean that they are weak because they are great in espionage and assassinations.