AFAIK, two rather obscure horror shows that have some rather disturbing portrayals of an invasive plant-parasite and a 'zombie-meme' that drives peopel to talk endlessly and become violent.
Splinter takes it's name since the parasite looks like sharp spines that invade a person's body and begins to take over locomotion and take over everyhign eventually. The nasty part of the Splinter is that it doesn't pay attention to bodily limits and bones break, muscles tear, organs rupture as it heaves it's host around.
Pontypool is a bit more difficult to describe. It starts when a certain word or sound repeats and the victim begins repeating themselves and engaging in violence towards non-infected.
ANy ideas on how to create these in Pathfinder terms?
Yellow musk creeper was kind of like the splinter. It attacks you, over runs your body, and converts you into a slave for the hive mind attached to you making a yellow musk zombie. Increase its size and give it a slam that does B/P instead of a pollen, and change its Create Yellow Musk zombie to a drain on a physical stat. Something like that might work, but its a general idea.
Pontypool might be weirder. Its not really a creature of any sort, and its weakness and the way it existed were nonsensical(thought that was the point. Maybe as a contagious plague of a spell it might make sense, but as a creature I'd have trouble seeing it. I would think it would be more of a GM mastery gig, where its a lunacy virus that affects a town and you move in to clear it out/cure it.
Or kind of like a Spellblight? I seem to recall some kind of degrangement that makes you babble in different language.
Perhaps the symptoms are the mixed up language and ability drain, once it hits zero, the host goes into Rage and must bite another livign being or die.
Rage or confusion might work. Its been a while since I've seen pontypool. Spell blights tend to only affect casters, so I don't think that would be one.
Pontypool "virus" could be a self-replicating language-dependent spell that acts as affliction - I'd say it drains Charisma. Anyone drained to 0 is affected with feeblemind and becomes violent towards unaffected.
When contact other plane fails, you make a will save to avoid coming down with Pontypool. It's an aberrant concept. Clerics can banish the afflicted to the far realm or try a cure insanity. Anyone forced to listen to the babbling must make a will save to avoid contracting it. Since the DC is based on the sufferers charisma, I would have it destroy intelligence instead of charisma.