Nightmare Fuel / Hammer and Bolter

• The episode "Plague Song". Holy Emperor, Plague Song! It can easily be retitled as "Squick: The Episode"
  • The Body Horror-rich transformation of Morior into a Nurgle-aligned Chaos Spawn in "Plague Song".
  • Nex, the Nurgling acting as the Avatar of Nurgle for the group, manages to be this despite largely being a Non-Action Guy for most of the voyage, snickering and giggling at the actions of his chosen leader. It's when they need to break open the door to the Astropath Chamber that he reveals his true power, as he begins to channel the power of a Great Unclean One to rewrite the door's locks, slowly and painfully sacrificing the Harbinger accompanying them as the key for the new lock he's made.
• The Chaos Spawn from "Monsters", It used to be a deer... emphasis on used to be.