[quote=@my Lalia]
[@NarcissisticPotato]
I don't see where the addiction to the change comes into your idea. It's a cool idea, but the parasite seems like a completely different entity.
[/quote]

That's ok! I think I'm going to go with some sort of shadow-type monster. The parasite was a decent idea but I didn't really know how to make the addiction work with it! Is it ok for the monster to share the same physical appearance as the character?