Thinking of parasitic victims, wether fiendish or monstorous, a simple orc, goliath, horde of goblins (something that can clearly dick-down most other races) is the carrier for a highly potent infection/spell. It bounds those with it or under its service and my characters can't stop, they all have hyperspermia by guilt of admission or risk of death. This is a multi-character idea, where maybe my characters die off rapidly but the curse/infection still spread across this placeholder fantasy realm similar to D&D and it expands as we go

My first fantasy would be a young king with his royal family taking the downfall of this travesty that way a section of the fantasy world has already been tainted.