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 thought 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 topic and I'm really fishing hard for some ideas on this.

Update (Aug 26,2016): I've given some more thought on this and I have a theory built up on it. This is how it goes, "All bodies killed by Players and NPCs from Yggdrasil disappear/dematerialize after a set time-period."

First, the case with the SS was that some of them disappeared after dying while in custody of Nazarick. Even chopped of body parts disappeared if they weren't cooked or put to other uses.

Second, the members of Zuranon and possibly including Clementine had their bodies collected but disappeared in the morning. This may have been due to outside interference but so far no solid hint of that has been made in story.

Third, dead bodies stored in the Frozen Prison have not disappeared due to them being actively been placed with a negative status, (Freeze).

Fourth, dead individuals that had been revived on-site may still be subject to the disappear/dematerialize phenomenon if resurrection had been delayed

Fifth, Gazeff's body had not disappeared due to the after effect of Ainz's [True Death Skill] due to the placement of the negative status (cancels low-level resurrection).