LitBridge about the supernatural (and mundane) world. The site is dedicated to helping writers of all levels become more professional with information about writing programs, contests and more.
On the writing prompts page, are links organized by a huge collection of categories from seasons, to mythological creatures, to beautiful words. Each page has 10-30 prompts. The collection the supernatural links below were taken from is about halfway down the page.
Here's a sampling:
Write a story about a man who virtually chats with an alien unknowingly. The man starts to fall in love with this mysterious stranger. What happens next?
Write a poem about yourself from the perspective of an alien.
Write a story about different dragons from varying cultures meeting each other. Try to research how different cultures perceive dragons to better give your dragons more realistic and culturally appropriate attitudes.
Write a poem about how to care for a dragon.
Write a story about a demon who wants to become good but faces resistance from fellow demons.
Write a story about a baby demon who is learning to help humans sin, possess their bodies and ultimately take their souls.
Write a story from a perspective of a main character who is looking for a dream. Why is he or she looking for a dream? What happened to their prior dreams? Describe the journey.
Write a poem about alternative views of fairies such as them being demoted angels, having connection to death, or as another race.
Write a story about a young psychic who discovers that she has the ability to communicate with people living in the future.
Write a poem with the following words: granite, evil, aqueducts, and gargle.
Write a story about a human who wakes up as a stone gargoyle. The story could be about the people the human gargoyle sees everyday. During the story, the gargoyle may be turned back into a human. What happens next?
Write a story that is entirely based in a ghost world.
Write a poem in the form of a ghost story.
Read literature that describes what heaven is like. This literature can include various religious texts. Write a poem dedicated to each of these types of heavens. Feel free to include your own perceptions of these heavens.
Write a story where the main character has a genuine fear of spending eternity in heaven.
Write a story where the main character is trying to be recruited by Lucifer to become the Antichrist.
Write a story about mermaids who live in modern civilization and have regular jobs, schedules and responsibilities.
Write a story from the perspective of the villain who happens to be a close friend or lover of a superhero.
Write a poem about a modern or fictional superhero who has truly failed in a crisis.
Write a story that begins with a superhero’s death and how the world reacts to it.
Write a story about a child who is raised in a family of werewolves. However, he did not inherit the family trait of being a werewolf.
Write a poem about transformation. Try to use an analogy that compares transformation with the type of transformation a werewolf may have.
Write a poem with the following words: mocking, blood, fangs and immortality.
Write a poem about the relationship between vampires and religion.
Write a funny story about a character who truly believes he/she is a vampire even though he may not be one at all.
Write a story about a zombie who slowly falls in love with another zombie.
What if your friend joined a cult that worshipped dogs?
What if your pet could only talk to you at midnight for an hour?
What if you could make any religious belief truly real? Which one would you pick and why?