User blog comment:Pualover/Overlord Power Level/@comment-138.162.0.42-20150910182203/@comment-26836039-20150911105907

I agree with Grimraven. The Six Great Gods must the guild next to Ains Ooal Gown in terms of possessing WCI. In Volume 1, it is said that Nazarick has 11 WCI which is rank 1 in Yggdrasil. The next guild (i.e. rank 2) possesses 3 WCI.

So far, we could relate 3 WCI items to the Six Great Gods:

1) Five Elements Overcoming - which has the power to change the magic system. It could be Ouroboros instead.

2) Downfall of Castle and Country - item used on Shalltear.

3) And the one that change the Language System. Could be Ouroboros.

Which means that if Ainz investigated more about the Six Great Gods, then he could probably deduce their guild name or members since they should be popular. Which also means they're around 90. Argghhh....well there's no proof that only level 100 can carry WCI.