An original character could be an antagonist too. For instance, a powerful sorcerer who has been in hiding for ages but emerges because he senses the power of the Dark Swan. He could be jealous of her power and wants to steal it for himself. He might use his own brand of dark magic and his knowledge of ancient spells to try and defeat the Dark Swan and take over the magical realm.
One idea could be exploring the origin of the Dark Swan's powers in more depth. Maybe she discovers an ancient magic that was long forgotten. Another plot could involve her forming an unlikely alliance with a character who was once her enemy to fight a greater evil that threatens their world.
Another fan - favorite is 'Our Ever After'. This one delves deep into their relationship, exploring their past traumas and how they overcome them together. It has some really emotional scenes that add a lot of depth to the story. The writing style is also very engaging, making it a must - read for any Captain Swan fan.
Once upon a time, in a dark forest, there lived a lonely witch. She had a small hut made of twisted branches and moss. The witch was shunned by the nearby village because of her dark magic. One day, a lost child wandered into the forest. Instead of harming the child, the witch took the child in. She used her magic to create a warm fire and fed the child with strange but delicious fruits from the forest. Eventually, she guided the child back to the village, but the villagers still feared her. However, the child knew the witch was not as dark as they thought.
One great 'Black Swan' 'Once Upon a Time' fanfiction is 'The Swan's Transformation'. It delves deep into the character from 'Black Swan' being transported into the 'Once Upon a Time' universe. The story beautifully weaves the dark and complex nature of the Black Swan character into the fairytale - like world of 'Once Upon a Time'. It shows how she adapts to new rules and magic systems while still maintaining her own unique identity.
The relationship between the dragon and the swan queen could be one of friendship. The dragon, being a fierce but lonely creature, finds solace in the company of the swan queen. She, with her kind and empathetic nature, accepts the dragon as it is. They might share stories under the moonlight, with the dragon's tales of far - off lands and the swan queen's stories of the local forest.
Redemption is also a big theme. Many fanfictions explore the idea of the Black Swan finding redemption in the 'Once Upon a Time' universe. Maybe she was a villain in her own world, but in this new world, she has the chance to change and be something better. This often involves her forming relationships with other characters and learning from them.
There could be a story where the dragon is a powerful protector of the swan queen. The dragon, with its great strength and fiery breath, guards the swan queen's realm from dark forces. The swan queen, in turn, has a special connection with nature and uses her powers to keep the land fertile and beautiful. In this fanfiction, their relationship could be one of mutual respect and cooperation.
Well, 'The Enchanted Bond' is a great one. In this fanfiction, a spell gone wrong binds Regina and Emma in a way that they can feel each other's emotions. This leads to a lot of self - discovery and a growing closeness. Then there's 'Facing the Darkness' where they have to enter a dark realm together. As they struggle through the challenges there, their relationship evolves from mistrust to something much more profound. Also, 'Shared Dreams' is interesting. They start having the same dreams which are actually clues to a mystery that only they can solve together, and this draws them closer.
Another common trope is the 'Time Travel' trope. Given the magical nature of the 'Once Upon a Time' universe, it's not surprising that many fanfictions use time travel as a plot device. For example, Emma or Hook might travel back in time to change an event that affects their relationship, or they could be sent to the future and have to deal with the consequences of what they see there in relation to their love for each other.