Anyone can join, with a 50-word vignette in the comments. Your vignette does not have to include the prompt term.
"The Society wants to talk to you."
Cal stood very still for a moment. "The Society of Champions," he said bitterly. "Bothering with a superpower. Aren't we supposed to manage on our own? A hero who can't help himself can hardly be a hero."
"I think they want your help."