Rivalry often plays a big part. Just like in the original 'this means war' idea, there's usually two sides at odds with each other. In the HP fanfic context, it might be two groups of students or different magical factions. For example, the Gryffindors and Slytherins might be in a 'this means war' type of feud over control of a secret part of Hogwarts. And there's also the theme of strategy. Characters need to come up with plans to outwit their opponents, much like in a real war situation but with a magical twist.
Competition is a common theme. It could be between characters for a powerful magical object or for recognition within the wizarding world.
One common theme is loyalty. When it's 'this means war' in a HP fanfic, characters have to decide which side they're on and stay loyal to it. There can be a lot of internal conflict as well. Another theme could be the use of magic in unconventional ways. Since it's a 'this means war' situation, the characters might have to push the boundaries of what they know about magic to gain an edge over their rivals. For example, a character might combine spells in a new way to create a powerful attack or defense mechanism.
One popular 'this means war hp fanfic' might be the one where the characters are put in a unique magical battle situation that mimics the 'this means war' concept. You can try looking on fanfic platforms like Archive of Our Own. They usually have a good collection of such stories.
One common theme could be healing. Since 'cauterize' implies a form of treating or sealing, it might be related to characters healing from physical or emotional wounds in the Harry Potter universe.
The theme of mystery often pops up in 'abandon hp fanfic'. Since the character is in an unexpected situation of being abandoned, there are usually a lot of unanswered questions. What led to their abandonment? Are there hidden forces at work? These mysteries drive the plot forward. Additionally, the theme of friendship in the face of abandonment can be strong. A character may find new friends who accept them despite their abandonment status, and together they face the challenges of the wizarding world.
One common theme is adaptation. The blind characters have to adapt to the magical world which is often very visually - oriented. Another theme could be the discovery of hidden strengths. Since they can't rely on sight, they may find other ways to be powerful, like enhanced magical senses.
One common theme is friendship. Tuck often forms new friendships or strengthens existing ones in these fanfictions. Another theme is adventure, as Tuck is usually involved in some sort of exciting journey.
One common theme is power comparison. Since both series have their own magic systems, fanfics often explore how the powers in khr stack up against those in hp. For instance, the flames in khr vs the spells in hp.
One common theme is the clash of different cultures. Loki comes from a different mythological background, and when his wife enters the HP world, there's a lot of cultural differences to deal with. For example, the magic in Loki's world might be different from that in Hogwarts.
Well, a typical plot element might be the discovery of a new, powerful magic item or spell. In this 'This Means War' fanfic, different characters or groups could be fighting over it. It could be that the item has the potential to change the balance of power in the wizarding world. Additionally, betrayal is often a great plot element. A character who was thought to be on one side might switch, creating chaos and fueling the 'war'. And of course, love interests can also play a role. Two characters from opposing sides might fall in love, adding an extra layer of complexity to the conflict.
One of the common themes is war strategy. In 'kingdom of war fanfic', there are often detailed descriptions of military campaigns, from planning attacks to defending strongholds. Another theme is the role of magic. Magic can be a powerful weapon in the kingdom's wars, and it often has its own rules and limitations. Also, the theme of sacrifice is prevalent. Characters may sacrifice themselves or their own interests for the greater good of the kingdom.
Survival is a very common theme. Characters are often faced with finding food, water, and shelter in a world that has been decimated by nuclear war.