Mushishi/Nightmare Fuel

• Remember the episode where the little girl's eyes were infected with Mushi? Remember when she finally opened her eyes and...
• Or what about the Mushi that made emotionless, fake children? Or perhaps the Mushi that re-animates corpses? Or the ones that infest your ears, make you deaf, and then kill you? Or the one that eats memories, leading to what is essentially Alzheimer's, and that is completely invisible so long as it is in shadow, so all it takes to get infected is to sit in the shade of the wrong tree?... Really, all of the mushi can be pretty horrific if you aren't careful with interacting with them.
• How about the Mushi that gave prophetic dreams/made them real? Sure it started out beneficial, but then it got to the point where the dreams started hapening in real life... including everyone except the dreamer being covered in green mold and crumbling away like dust.
• The concept of mushi in itself is rather disturbing - ethereal creatures which are neither animal, plant or human - and as such are so very like and unlike the world they influence in myriad ways and reasons, often simply by chance events or encounters.