Written by L. Ron Hubbard, Scientology’s original OT VIII level had Hubbard describing himself as the Antichrist spoken of in the Book of Revelation:

No doubt you are familiar with the Revelations section of the Bible where various events are predicted. Also mentioned is a brief period of time in which an archenemy of Christ, referred to as the Antichrist, will reign and his opinions will have sway. All this makes for very fantastic, entertaining reading but there is truth in it. This Antichrist represents the forces of Lucifer (literally, the “light bearer” or “light bring”), Lucifer being a mythical representation of the forces of enlightenment, the Galactic Confederacy. My mission could be said to fulfill the Biblical promise represented by this brief Antichrist period. During this period there is a fleeting opportunity for the whole scenario to be effectively derailed, which would make it impossible for the mass Markabian landing (Second Coming) to take place. The Second Coming is designed, among other things, to trigger a rapid series of destructive events…