Nightmare Fuel / Darth Vader: Dark Lord of the Sith

• The experience Vader has when he passes through the dark side locus on Mustafar. He sees himself as a child being frightened by himself as Vader, he cuts through apparitions of his former friends and teachers while basically destroying the Jedi all over again, and finally his meeting with Padmé which is nightmarish as she kills herself by auto-asphyxiation.
• Vader single-handedly slaughtering all the bounty hunters sent out to kill him. And it's then revealed that he did this just because he was bored, since he didn't have any challenges anymore now that almost all Jedi were dead.
• Vader and the Inquisitors killing Eeth Koth and kidnapping his infant child for use in Palpatine's machinations. And in the following issue, Vader pursuing the romantically-involved Inquisitors and killing them just because no relationships are allowed in the Inquisitorius.
• The Mask of Momin is already very creepy, having outright told Palpatine about its past and possessing one of the Imperial architects, killing the other, and developing a finalized plan for Vader's Mustafar castle. But it also gives Vader a very grotesque vision showing kid Anakin with a completely deformed face that resembles Vader's mask. We get further backstory and apparently Body Horror was a specialty of Momin's from childhood, when he cut up his rada cat in the name of art. If that wasn't bad enough, the entrails are actually shown on-page.
• When Vader finally makes his bid to resurrect Padmé, he's transported to what can only be described as a dark, twisted version of the World Between Worlds. Better still, this fanmade dub of the scene manages to expertly convey just how nightmarishly haunting and tragic his visit to this realm is.
• Out of boredom, Vader asked Tarkin to put together a group of hunters and try and kill him. The hunt is terrifying due Vader being just that formidable, but the end is even more terrifying when not only Tarkin takes down Vader by tricking him into getting hit by lightning, it turns out he had planned for that since the start (if as a last ditch desperate plan), even taking into account Vader being taller than him.
  • And then Vader gets more terrifying than ever when he musters just enough energy to Force Choke Tarkin to his knees. Remember the Force Choke scene in ANH and Tarkin's uncomfortable reaction? He's having flashbacks to this moment, when he learned just how powerful Darth Vader really is.