It is revealed that the mercenaries were working for Lucifer's twin brother, Michael. Michael is hunting for the key to the Flaming Sword, which was hidden in a necklace buried with Caleb Mayfield.
Watch the reactions to some of the most intense moments of this episode, including the search for celestial artifacts and Chloe's difficult decision regarding her career: [S5E15] Is This Really How It's Going To End?!
Witnessing the injustice of Dan’s death and the suffering of those left behind gives Lucifer a new reason to become God : he wants to fix a broken system where "good" people like Dan can still end up in Hell. It is revealed that the mercenaries were working