Well, it could be that the 'impaled' aspect is part of a plot where Merlin is the victim of an attack, which might tie in with themes of betrayal or unexpected threats. Another possible theme could be Merlin's survival and recovery from such a traumatic event, which could show his resilience. It might also be used as a way to explore the reactions of other characters in the Merlin universe, like Arthur's response to Merlin being in such a state.
I'm sorry, but I'm not aware of specific 'Merlin impaled' fanfiction. However, you can try searching on popular fanfiction websites like Archive of Our Own or FanFiction.net.
Fanfiction about 'sakura impaled' could potentially be about a situation where a character named Sakura is in a dangerous or perhaps symbolic 'impaled' state within the context of a fictional story created by fans. It might involve elements of drama, action, or a unique take on the Sakura character's story.
I'm not sure specifically about 'sakura impaled' fanfiction being extremely popular. It's a rather specific and perhaps somewhat niche topic. There could be some stories out there in the vast expanse of fanfiction, but it's not as mainstream as some other types of fanfiction.
One possible storyline could be that a villain manages to impale a hero during a battle. For example, a powerful meta - human villain with sharp - edged weapons as part of their powers could catch the Flash off - guard and impale him. This could lead to a story of the Flash's struggle to recover, both physically and mentally, and his allies' efforts to protect him while he heals.
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.
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.