One great Merlin and Gaius fanfiction is 'The Mentor's Wisdom'. It delves deep into their relationship, showing how Gaius has been guiding Merlin not just in magic but also in understanding Camelot's complex politics. Another good one is 'Gaius's Secret Journeys' which explores Gaius's past and how it ties into his present interactions with Merlin. There's also 'Merlin and Gaius: Unseen Bonds' that focuses on the unspoken understanding between them.
The relationship between Merlin and Gaius is complex and full of depth. In fanfiction, it can be explored further. Their dynamic of teacher - student, along with the fact that Gaius is one of the few who know Merlin's secret, makes for interesting stories.
Love and friendship are common themes. Their relationship often starts as a friendship that gradually blossoms into love. Writers like to explore how they support each other through good and bad times.
In a more humorous take on the 'Merlin tied to a bed' fanfiction, it could be that Merlin has fallen ill and the overly - protective Gaius has tied him to the bed to make sure he rests. Merlin, being the active person he is, complains constantly. Arthur comes to visit and teases Merlin about finally being still for once. Meanwhile, Merlin tries to convince Arthur to let him loose, promising that he'll be fine. Eventually, Gaius relents and unties Merlin, who then immediately starts bustling around the room.
There's also 'Gaius and Cordelia: A New Beginning'. In this fanfiction, it focuses on a scenario where they have to face a great challenge together. This not only tests their relationship but also shows how they support and rely on each other. It's quite engaging and has a lot of character - driven plotlines.
If Merlin died in the fanfiction, it could trigger a series of tragic events. The balance of power could tip, and the villains might seize the opportunity to attack. It could also bring out hidden strengths in the remaining characters as they try to cope with the loss.
One more idea is that Merlin is tied to the bed in a dream - like state created by an ancient magic. In this dream world, he is faced with his deepest fears and insecurities. His friends in the real world notice his strange behavior and try to wake him up. Merlin, while in the dream, has to find the source of the magic that is binding him and break free. Through his inner strength and the memories of his friends, he manages to do so and wakes up, having learned more about himself and his magic.
If Merlin is a Dark Lord in fanfiction, it could be an interesting exploration of the 'nature vs. nurture' concept. Maybe he turned dark because of the constant fear of being discovered and persecuted for his magic. His actions as a Dark Lord might include taking over Camelot or exacting revenge on those who wronged him in the past. It gives a whole new perspective on his character.
Their relationship could develop through shared experiences. For example, if they both get involved in helping a new villager settle in. This would allow them to see each other's kind sides and build a mutual respect.