I’ve done more than 700 of these things consecutively and I’ve run into a creative wall over the past week or so. There are always days when I feel like I can’t get a prompt out, but this is the first time I’ve actually missed prompts because of that. So I’m going to give myself some time to refresh.
A magic system wherein people can respawn from death, but only if the rest of their family is killed too.
A race with physical anomalies attached to their moods. Some might actually turn red when angry, jump higher in joy, or their nose may grow longer when they lie.
Worldbuild a sci-fi setting with laser guns, lightsabers, spaceships, etc. Then make it fantasy. Alternatively, take a fantasy setting and make it sci-fi.
A protagonist who has sworn to be evil after a life of being good, but who makes so many mistakes that every time he tries to do something horrible, he ends up doing something good.
A time-travel system rooted in dogs. People can warp through time, but can only see through the eyes of dogs throughout history and into the future. They can’t change anything. All they can do is watch — and listen, and smell.
A group of explorers from magical society discover a village full of people who assume their magic is merely fancy technology.
Design a magic system that produces the greatest possible amount of explosions. Now give it a huge cost for looking awesome, like sucking all the oxygen out of the atmosphere.
Your protagonist is a serial killer who uses magic to commit his murders. Remember, the protagonist doesn’t necessarily have to be the good guy.
Write a ridiculously convoluted plot involving backstab after betrayal after treachery; completely ham it up, then actually bring it all to a sensible resolution.