A curse is a common trope, from Fairy Tales to Buffy the Vampire Slayer, curses have been used to throw a twist into the plot.
Sometimes the reader knows the curse from the start, which is how most fairy tales work. Or sometimes they know the curse from the start but they don’t know the catch, which is how it works in Buffy The Vampire Slayer.
It is fun to play around with the idea of a curse, and I encourage you to do so by writing either a poem or a short story about a curse. Your curse could be metaphorical or real but it should involve some sort of twist or surprise. Remember with a prompt this flexible, a lot of things are possible.
Happy Writing!