User blog:CrimsonWarden/Disappearing bodies phenomenon

I've gone to rereading all 10 LN volumes of Overlord while waiting for the 11th to be released and got really curious with the "Disappearing Bodies phenomenon."

In small mentions in throughout Vol 2 and in the case of the death of the members of Zuranon in Vol 3, bodies and body parts from NW humans that were killed by residents of the Tomb of Nazarick disappeared. I imagine that this would be something like the death effect of monsters and players in Yggdrasil and I'm wondering how this applies to NW residents.

Moving on to later volumes, there are instances when I though this effect might happen on other creatures and humans killed by Nazarick, the Lizardmen, the Eight Fingers, Workers and Knights of the Empire, and soldiers of the Kingdom, but this didn't happen. Could someone enlighten me with some theories regarding this.

P.S. I also made a page on this and I'm really fishing hard for some ideas on this.