Since it is wrapped in secret and misdirection, that of the Deceiver tbh.
How would the AC get the whole world wonder after and worship it? Perhaps by exposing worldwide human trafficking, pedophilia, organ harvesting, cannibalism, and ritual magic.
Seems like that is one possibility to be sure.
The biblical plan of the return of Messiah and his army does not detail a need for cunning secrecy, lies, traps, and misdirection.