User blog comment:Nomad27/Predictions of what will Occur in Volume 10./@comment-119.95.138.89-20151122081828/@comment-183.80.128.92-20151122143120

If it's someone who Ainz need to mobilize most of the guardians then that someone has to have one hell of firepower, at least more than Ainz himself. My best guesses is the dragon lords that helped the 13 heroes to fight against the devil entity and Rubedo, Albedo's sister, Nazarick's most powerful NPC whom Albedo borrowed under the pretext of wanting to make the most powerful team in Nazarick to search for the suppreme beings in the new world.