Editing Lucifer (Marvel Comics) (section)

==In other media==
In the novel ''Shadows of the Past'' by [[Michael Jan Friedman]], the alien [[#Lucifer (Quists)|Lucifer]] is revealed to be alive, capturing Professor X and replacing him with an ionic energy duplicate, the duplicate possessing the real Xavier's memories and powers while nevertheless unquestionably loyal to Lucifer. In the process, Lucifer also traps Xavier in the Nameless Dimension with him, the Nameless Dimension being depicted as a featureless realm filled with a thick liquid-like substance that Lucifer and Xavier can 'breathe' as though they are still inhaling oxygen. Although Lucifer is able to create beings made of pure ionic energy, his ability to create such beings is apparently limited, and they are of limited capabilities; two such beings were able to defeat Xavier and [[Iceman (Marvel Comics)|Iceman]] and abduct Xavier only because they had the element of surprise and raw power as well as being immune to telepathy.

Due to the limitations of these constructs and his own twisted sense of irony, Lucifer has the duplicate Xavier use the original X-Men as his agents, sending them to acquire three components from Quistalian outposts around the globe. The duplicate Xavier intends to use these components to alter the machine that had sent the Professor into the Nameless Dimension so that it could be used to create a new portal that would allow Lucifer to return to Earth, the duplicate claiming to the X-Men that he could use those components to devise a machine to protect Earth from future Quistalian invasion. Xavier attempts to warn his students, but although he can telepathically penetrate the dimensional barrier to witness events back on Earth, his abilities are subsequently too weak to access the complex minds of either Beast or Jean Grey.

Fortunately, Xavier was able to make contact with Jeffery Saunders, the mentally handicapped grandson of a recently deceased friend, whose limited mental state made him more 'open' to Xavier's influence. Using Jeffrey's physically superior body - the young boy being an exceptional athlete despite his mental state - the Professor was able to alert the X-Men to the deception when the duplicate Xavier just tried to have Jeffrey sent home when he first came to the mansion; Iceman had witnessed the real Xavier interacting with Jeremy at his grandfather's funeral, and was struck by how the duplicate was acting far more distant towards Jeffrey. With the duplicate Xavier captured, Xavier-in-Jeffrey accompanied the X-Men when they departed to retrieve the final component, and was later able to defeat an ionic duplicate of [[Warren Worthington III|Archangel]] - created after the original was injured and captured while they were investigating one of the facilities - that could have allowed Lucifer to use the newly modified portal to return to their dimension.

Although Xavier was briefly tempted to destroy the machine when he thought that Lucifer might be able to reach the exit portal before him, Jeffrey was able to help him escape by 'sending' the Professor his own youthful energy back along their psychic link, giving Xavier the strength to beat Lucifer to the portal in a swimming race. The portal was deactivated just as Lucifer's hand attempted to emerge after Xavier, and the machine was subsequently destroyed by [[Cyclops (Marvel Comics)|Cyclops]]. When the team returned to the mansion, the duplicate Professor X is found to have ceased to exist while trapped in his prison, leaving Lucifer to fume and plot his revenge in the Nameless Dimension once again.<ref>''Shadow of the Past'' novel</ref>