Poor Communication Kills: Laura's efforts to keep Darlene out of the loop constantly backfire, as Darlene repeatedly ignores her instructions because Laura refuses to explain why following these instructions are important.
Puppeteer Parasite: The dancers at the "Realm of Realms" are controlled by some kind of parasites (likely created and/or deployed by the host, Queen Inichoochiama (played by Shangela), whose insectoid humanoid features resemble these parasites) and seem to be conscious and in torment while their bodies are being puppeteered.
The Reveal: Satan has lost a chunk of power, having lost it when Chrissy was born.
Serial-Killer Killer: Implied. Laura ends up flirting with a Serial Killer (played by Patrick Wilson), identifying him as such the moment she sees him and the two attempting to kill each other is treated as foreplay. Either Laura Has a Type or she took up bounty hunting people in the past and gets off on the adrenaline rush.
Take That!: Many of the "arenas" the battles in the Realm of Realms takes place in are "torture chambers" like a DMV, a Suck E. Cheese's and an Open-Mic Night with acoustic guitar and improv troupes.
Unwanted Rescue: Laura and the serial killer spend most of the night flirtatiously trying to kill each other. Just when one of them has a shot at doing so in a back alley, Darlene comes and stabs the killer in his ear with the heel of her shoe. Laura is annoyed by this, since she was trying to kill him (and most likely because Darlene just ruined the mood).