User blog comment:Pualover/Overlord Power Level/@comment-138.162.0.42-20150910182203/@comment-5480911-20150910201210

The thing of it is....is that certain world class items...those which are known as the great 20 have the power to change the world mechanics....there is a thoery that the six great gods used these items to change the world....it was stated that 600 years ago all of sudden every person within the new world was able to understand each other..depsite having different languages and cultures. another thoery is that the world class items change the world in order to introduce the tier magic as form of magic that everyone can use.

As for the power of the Six Great gods...it is unknown exactly there level were...at best it is jsut speculation.... they could have been lvl 100..or below but there is still not enough evidance to support either case....now the Eight Greed Kings they have a basis to form a level esitmation cause it was esitamted that each king can go agaisnt 10 dragon lords. now dragon lords have an esitamted level 80-85. now this was compared to Zy'tl Qae. which again is actually a minimum esitamtion. cause for all we know we they could be stronger...but we do know that to defeat Zy'tl Qae..if u were not a player than the only that could beat was a DL. so we can estimate that the Eight Greed Kings were around lvl 90.

I think later down the road we can actually get an idea as to who the six gods were when we explore Slane theocracy more... as for the Eight Greed Kings...Ainz has stated the possibilty that he might know who they are as there floating castle guild base seemed familair to him...so later down the road when he will explore it...we can get more info on it.