Can Ainz Oal gown make Clones of himself?
Pandora's Actor has the ability to disguise himself as Ainz and others.


  As a higher-tier Doppelgänger, he has an ability to mimic a player based on their appearance as well as their ability.


He already did that in episode 10 of season 2 while meeting Sebas and Tuare.
It is reasonable to assume that the same happened in episode 13.

Source