I had the idea for darkri bondage part could start on the ship that she wanted to mess with other legends maybe psychic that were playing jump rope but instead got tied up instead while the legends ran away. The MC is nearby and hears her swear bloody revenge and decided to teach her a lesson which leads her to liking being ted up and unable to control the situation. It would be funny and she would then have a big orgasm at the end and realize she likes this kind of play and would like to try it on others in their dreams. The jump rope could be made from a really strong bug type since the material would need to be strong enough to be played with by legends and not break thus a good fit for weakness.
This could also be used on flying type legends since having their wings bound would make them grounded and thus be considered a rock type? With their wings bound they would become more susceptible to attacks and damage thus a elevated pleasure from the MC. This would allow a kind of bondage to be used not only for dark type but also flying if this seems feasible to write.