This, along with Superman interfering with his criminal agenda and openly disrespecting Luthor in front of the media, motivates Lex to humiliate and destroy the alien hero.
Its power is great enough that Luthor could fly for several days without interruption.
He later moves his operations to the nearby town of Hadley.
He occasionally wears his Warsuit, a suit of mechanized armor that gives him enhanced strength, flight, advanced weaponry, and other capabilities.
With the creature's power at his command, Luthor draws out Superman to him and attempts to drive the hero mad by forcing him to experience real human emotions, believing the Last Son of Krypton only fakes humanity in order to be trusted.
For Rosenbaum, Lex is being pushed and pushed, and Lex is afraid that he will reach the point that he knows he will no longer be able to come back from.