JoJo's Bizarre Adventure/Nightmare Fuel

• Ebony Freaking Devil, Devo the Cursed's Stand. The scariest thing to come out of the 20-plus-year-running manga.
• Two words: SCARY MONSTERS.
• Notorious B.I.G., an horrific, carnivorous blob that will devour anything that it sees (unless softened by Trish's Spice Girls Stand). But the worst part? It can't die. The heroes can't kill it. They have no way of ever killing it. They can only drop it into the ocean and render it mostly harmless, but the narration states that it still attacks passing ships.
• Axl Ro's Stand, Civil War, in Steel Ball Run Chapter 56 and 57, which attacks by manifesting the guilt and sacrifices made by the opponent and fusing with their bodies. Hot Pants and the body of her deceased younger brother, Johnny and 'Danny', etc.
• Vanilla Ice's stand, Cream. It's horrifying to see how it takes out Abdul and Iggy. Iggy might be worse since he gets cut in half and you have to look at his waist stump.
  • In the anime, anyway. In the manga Iggy dies by the wounds he sustains from a literal Kick the Dog moment and by protecting Polnareff.
• The way in which Dio manages to deal with what happens to him at the end of Phantom Blood is quite shriek-invoking.
  • Let's not forget how he sends Johathan's Dog to the incinerator just to break him. Why? Because he's a dick. This is even before he became a vampire.
  • Would the scene in which he turns that woman into a zombie and calmly watches her eat her own baby count?
    • We can elaborate on that. The woman Dio has brought before him is begging him to take her, but spare the baby. He gives her his word that he will not even touch it. Shortly afterwards, the zombie mom does as is said above. He kept his word. But, once more. Moment of Complete Monstery right there.
• Alessi. Full-stop. His stand, Sethan has the power to turn those who stand in his shadow into children, so he can have an easier time of killing them. The sequence involving him focuses around his attempts to kill Polerneff, it wastes no time in showing how powerless and helpless he is as a child. Oh, and he keeps getting a lot younger as the chapter goes on, so there's literally nothing he can do to defend himself. That's not even the best part; that would be what becomes of a bystander woman who happens to run into Polnereff as child, but stays in Sethan's shadow for so long she becomes a fetus. She recovers, and things end just well enough, but that doesn't stop the chapter from being very tense and disturbing.
  • And in the video game, Alessi is a playable character from the start. Yes he can use Sethan to turn any character in the game into a child (save Joseph, who just reverts to his Arc 2 look), but that's not the disturbing part. Whenever someone is turned into a child, he pulls out an an AXE. Which, yes. Does a lot more damage. Also, when his target is at normal age, he's his usual Dirty Coward self and has a particularly fast backdash. When they're children? It's his forward dash that's faster than usual. The icing on the cake really is his theme, which sounds like the theme of a manic serial killer.
• During the fight with Tarkus in Part 1, he decides to grab two hapless townsfolk, and crushes them to paste with his bare hands, before drinking the body juices that came out. We even get to see one of the victim's have the skin on his face tear off near the end of it.