"ELYTRA _ ORIGIN" allows attach other entities elytra model.

[Chuzume]

With ELYTRA_ORIGIN, Elytra equipped by other entities will also be displayed on the model In this image, the Elytra is equipped with an armor stand, but shown on my model.

[TheAyes]

Seems to be similar to this one: MobZ adds a mob called Fiora that causes it to copy your figura model and imitate all of your animations. This is not supposed to happen. https://github.com/rikka0w0/MobZReborn/issues/24