A fanfic that stands out is 'Fem Merlin and Morgana: A New Alliance'. In this story, they form an unexpected alliance against common enemies. It's full of action and also has some really sweet moments between the two characters. There's also 'Fem Merlin's Secret and Morgana's Discovery' which is interesting as it focuses on the secrets fem Merlin has and how Morgana slowly uncovers them, leading to a deepening of their relationship.
First, you need to understand the characters well. Read up on their backgrounds and personalities in the original source material. Then, come up with an interesting plot. It could be something like a quest they go on together or a mystery they have to solve. For example, you could have them searching for a lost magical artifact. Also, focus on their relationship development. Show how they start to trust and care for each other.
There might be. Fanfic communities are quite creative. However, the availability may vary. Some platforms may have a good number of such fanfics while others might have fewer. You could also check out some Merlin - related forums where fans might share or recommend such stories.
Another theme is the exploration of their powers together. Fem Merlin and Morgana both have magic, and in fanfictions, they might combine their powers for a greater good or to fight against a common enemy. This could lead to some really interesting plotlines where they are like a powerful magical duo.
You can try fanfiction.net. It has a large collection of fanfictions including those related to Fem Merlin and Morgana. Just use their search function and type in 'Fem Merlin x Morgana' and you'll get a list of relevant stories.
You could also try Fanfiction.net. Although it may not be as organized as AO3 in some ways, it still has a large number of fanfics. Just be sure to use the right search terms and explore different categories related to the Merlin fandom.
I also like 'Merlin x Morgana: A New Beginning'. It rewrites their story from the very start, giving them a chance to form a different kind of bond. The author does an excellent job of developing their relationship in a more positive light, away from the animosity often shown in the original series.
One common theme is the exploration of gender roles. Since Merlin is female in these fanfics, it often challenges the traditional gender roles in the Arthurian legend. For example, how a female Merlin would be perceived as a sorcerer in a male - dominated society like Camelot.
I really like 'The Female Merlin's Quest'. In this fanfic, the author does an excellent job of showing how a female Merlin would interact with Arthur in Camelot. It has a great plot that involves magic, politics, and of course, their growing affection for each other. There are some really touching moments that make it a great read.
Characterization. If the fem Merlin and Arthur are well - developed, it makes the fanfic great. For example, if fem Merlin has her own unique personality traits that still retain the essence of the original Merlin, and Arthur reacts to her in a believable way. Also, a good plot that blends the Arthurian setting with new and exciting storylines, like a new magical threat or a political drama that brings them closer.