A good supernatural power is defined as much by its limits as by what it can do. This generator never gives you a blank cheque: every ability arrives with a trigger that controls when it works and a limitation that makes using it cost something. That structure is what turns a flashy gimmick into a source of real tension and character.
How it works
The tool keeps three independent tables. The first holds abilities — seeing
seconds into the future, walking through shadow, draining another’s strength.
The second holds trigger conditions such as only under the light of a full moon or only when you are afraid. The third holds limitations such as each use steals a memory you can never recover. When you Generate, it draws one
entry from each table with the browser’s random number generator and joins them
into a single balanced description, avoiding immediate duplicates when you
request several at once.
The trigger-limitation structure and why it matters
An unrestricted power removes narrative stakes. If a character can always do what they need to do, there is no reason to worry about them. The trigger and limitation work together to create two kinds of dramatic pressure:
The trigger determines when the power is available. A power that only works when the character is afraid means every tense confrontation is also a question about their emotional state. Do they let the fear in, or do they try to stay calm — and lose access to the one thing that could save them?
The limitation determines the cost. A cost paid in memories, years of life, physical injury, or harm to someone nearby means using the power is never free. The most interesting moments in supernatural fiction are usually the moments when a character has to decide whether to pay the cost.
Example abilities
| Ability | Trigger | Limitation |
|---|---|---|
| Halt time for everyone but yourself | Only when you are afraid | The power slowly begins to use you instead |
| See seconds into the future | Only under a full moon | Each vision replaces a real memory with a false one |
| Walk through shadows unseen | Only in complete silence | Leaves a trace that something old can follow |
| Drain another’s strength | Only when you are touched | You feel every injury you take from them |
How to adapt the output
These three parts are independent. Generate a batch, then mix: take an ability you like, a trigger from a different result, and a limitation from a third. Because the parts are modular, any combination is valid. Once you have a combination you want to keep, ask the character question: how does this person relate to their power’s condition and cost? A character who fears their trigger will try to avoid using the ability at all. A character who welcomes the cost becomes someone else entirely.
Edit the wording to fit your world’s vocabulary, and treat the limitation not as a footnote but as a promise you are making to the reader — it will come due.