In Season 2, Episode 11, titled " Stewardess Interruptus ," the story centers on Lucifer and Chloe investigating two of his former lovers who are murdered, while Charlotte continues her manipulation of their relationship. Plot Summary: S02E11
While Episode 11 focuses on the "miracle" reveal, the broader story of Season 2 involves Lucifer, Amenadiel, and Charlotte trying to assemble the to storm the gates of Heaven.
The episode concludes with a major bombshell: Charlotte meets with Maze and reveals that Chloe is a "miracle" intentionally placed in Lucifer's path by God, casting doubt on whether Lucifer and Chloe's connection is genuine or just another piece of his father's plan. Season 2 Context (The Flaming Sword)
Only Lucifer, as the "Lightbringer," can ignite the sword using his inner emotions (specifically his pain and anger). Lucifer Season 2 - Martin Stellinga