Yellow Wallpaper (5e Hazard)
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Yellow Wallpaper[edit]
This magical paper is seemingly alive and can be found across the multiverse, often in places where it shouldn't be like sewer tunnels, stone temples, crypt walls, and wooden fortresses. Once the design has manifested in one portion of a building, it will begin to spread, like a living hallucination or an decorative mold. It's origins are unknown, but it has been suggested by wizards to be the result of a high level enchantment gone awry. Diviners have only ever received the cryptic response of "DON'T" when they ask the gods about it.
When players enter a room with the Yellow Wallpaper, all characters with a Passive Perception of 15 or higher, will notice that the vine design on the wallpaper creates an optical illusion, that makes it appear to be moving. For every 1 minute spent within a room containing Yellow Wallpaper, characters have to make an Intelligence saving throw. On a failure, their Intelligence score is decreased by 1 until they take a Short Rest in an area that does not contain Yellow Wallpaper. Characters who are reduced to 1 Intelligence by Yellow Wallpaper will go stark, raving mad, and begin attacking themselves and their allies. Only a greater restoration or wish spell will return them to sanity. If a character uses detect thoughts on a character suffering from insanity caused by Yellow Wallpaper, they will hear only the word "yellow" repeated ad nauseum.
Yellow wallpaper can be destroyed with fire, but will grow back over 3d4 weeks, unless the building in which it was found is utterly destroyed or unless a wish spell is used to destroy it. Undead, Aberrations, Constructs, and creatures which speak Deep Speech are seemingly immune to the effects of Yellow Wallpaper.
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