I had an idea for a potentially new story and it essentially goes like this:
The story is centered around a new parasite. It is a worm that has two heads both with gaping mouths and rings of teeth. When it infects someone, it produces weird hallucinations of a completely bald guy with pitch black eyes and a fur coat that taunts and harasses its host. The illusion is basically a demon who gives its victim a period of time to destroy the human race by going to some kind of temple and activating something. If it's victim doesn't do it, the parasite kills the host and moves on to the next.
I want the story to follow a protagonist who is afflicted with this parasite and fights to save him/her self. Only problem is this is just an idea so I don't know what kind of protagonist to have and how the story should end. Should the protagonist defeat the demon and save the human race (somehow?) or should it just end with the protagonist dying alone or with the rest of all humanity? I have no idea what would be best for a story like this so PLEASE SHARE YOUR THOUGHTS!!! :> :>