Avatara

“This is the final trap emplaced here; the Avataras within are programmed to attack anyone with a Ring, even if that person is you or me.” - Momonga Avatara are the 37 golem defenders of the Great Tomb of Nazarick's Mausoleum. Each Avatara is designed to attack anyone in possession of a Ring of Ainz Ooal Gown. Each of them are armed with the unique weapons used by the Supreme Being they mimic.

Appearance
Avatara were created by Momonga based on the appearance of his former guild members who quit playing YGGDRASIL. He did this by purchasing the external appearance data, then forcibly installing it into the golems. This caused the Avatara to differ from the members of Ainz Ooal Gown they were made to mimic by making their limbs either fatter or shorter than normal, and their heads to grow massive, causing a sense of unease in those who look upon them.