The Antichrist
Jack Van Impe always describes it as the antichrist being incarnated by Satan, which makes sense. His power will come from thje beast.
Revelation 17:8
The beast that thou sawest was, and is not; and shall ascend out of the bottomless pit, and go into perdition: and they that dwell on the earth shall wonder, whose names were not written in the book of life from the foundation of the world, when they behold the beast that was, and is not, and yet is.
Revelation 17:11
And the beast that was, and is not, even he is the eighth, and is of the seven, and goeth into perdition.
This goes back to Daniel with the dream of the ten toes. It's been said for a long time that the antichrist will come out of the Roman Empire;The beast that was. That fell; The beast that is not. And yet is; The Revived Roman Empire. So the antichrist will come out of the revived roman empire.