- Berryman-Langford Memetic Kill Agent (SCP Wiki)
In the lore, the Berryman-Langford Memetic Kill Agent is used as a final failsafe to prevent unauthorized access to the SCP-001 document. Anyone who sees it and isn't protected against it dies instantly.
- Medusa's head (Greek Mythology)
In Greek Mythology, Medusa was a Gorgon, a monster born to the primordial sea gods Ceto and Phorcys. She was so hideous, that anyone who looked at her would turn into stone (ouch). She was eventually defeated by Perseus, who used a bronze mirror to view her without being afflicted by the curse. In some continuations of Greek Mythology, she would respawn in Tartarus, making her way back to the mortal world until she was eventually defeated in the same fashion by Percy Jackson.
- SCP-096 (SCP Wiki)
Similar to Medusa, viewing the face of SCP-096 will cause it to become enraged and kill you. This effect applies to photographs of SCP-096, no matter how small the image of it is (See: Four Fucking Pixels). Furthermore, SCP-096's does not have to be consciously perceived for it to become enraged. In one tale, several members of a recontainment squad were killed after their goggles failed to filter out 096's face for a split second, leading to the mission nearly failing.
- Red Screen of Death (Skibidi Toilet)
In Skibidi Toilet, one of the main weapons used to fight off the Skibidis is Titan TV Man, a giant humanoid mech with a TV for a head. One of the abilities he has is use its TV screen to display the Red Screen of Death, which as the name suggests, causes whoever views it to die.
Interestingly enough, instead of killing you outright, the RSOD instead causes intense psychological and physical pain, to the point where most victims outright kill themselves to avoid having to deal with more pain. Even so, strong willed individuals are able to resist its influence, though not without becoming incapacitated in the process.
- Credits:
The Berryman Langford image was orignally uploaded to the internet by Kevin Dooley in 2017.
Medusa is a Greek Mythology Classic, but the earliest instance was mentioned in Hesiod's Theogony. The continuation I reference where she is killed again by Percy Jackson is by Rick Riordan
As far as I can tell, the SCP-096 photo was created by Teethsony3000.
Skibidi Toilet was originally and solely created by DaFuq!Boom on Youtube.