Talk:Clementine/@comment-26955555-20171217155952/@comment-45.56.46.26-20180512212912

At that point in the story, Ainz was convinced that Resurrection magic was unknown in the NW. It was only after becoming appraised of the existence of secret organizations with more powerful abilities that he realized his mistake.

While he could scold himself in retrospect, really it would be a reasonable oversight. Also, as mentioned, the information about Momon being Ainz in disguise has been rendered irrelevant by subsequent developments.