Another theme could be the impact on the wizarding world as a whole. If Harry is involved in abusing creatures and has a new inheritance related to them, it could change the balance of power or the way the wizarding society views creatures. There might be political or social unrest as a result, which makes for an interesting exploration in the fan fictions.
One common theme could be the exploration of Harry's character in a new and darker light. Since it involves 'abuse', it might show how this affects his relationship with creatures and the inheritance aspect could be about some new powers or abilities related to creatures that he discovers in an unorthodox way.
Finding such specific fan fictions might be a bit challenging. You could also try joining some Harry Potter fan groups on social media platforms. People in those groups might be able to recommend some fan fictions that deal with this rather unique concept of 'Harry abused creature inheritance'.
One common theme is self - discovery. Harry has to figure out what his creature inheritance means for him and how it changes his identity.
One common theme is redemption. The abusers might realize their wrongdoings through the course of the story, especially if Harry or his friends intervene. For example, if a group of wizards are abusing centaurs, they could be made to see the error of their ways. Another theme is empowerment. The abused creatures often gain power, either through magic or through alliances, to fight back against their abusers.
A theme that might be present is the power of love and connection. Despite their differences and the difficult situation Harry is in, the bond between Lucius and Harry could be a central theme. Also, there could be a theme of transformation. Lucius's view of the world and his actions might transform as he becomes closer to Harry, and Harry himself might transform from a victim to someone stronger with Lucius by his side. This kind of fan fiction often plays with these complex emotional and character - development themes.
Love against all odds is also a frequent theme. There are often external forces like dark magic, or the disapproval of the wizarding community that try to keep Harry and the creature apart. But their love prevails, showing the power of love in a rather fantastical setting. This makes the stories very engaging and full of emotional highs and lows.
One common example is werewolf inheritance. In some fanfictions, a character discovers they have werewolf genes in their family line, which causes them all sorts of problems and adventures. Another is veela inheritance, making the character very attractive and having some charm - related powers. And then there's also house - elf inheritance, which might give a character an unusual connection to domestic magic and a strong sense of loyalty to a particular place or person.
In this kind of fanfiction, creature inheritance often works through family bloodlines. If a family has a long - ago connection to a certain creature, like an ancestor who made a pact with a unicorn, that connection might be passed down generations. It could also be triggered by a magical event. For instance, if a character is in a place where a powerful magical creature once lived and a magical energy is released, it could awaken the inheritance.
The theme of understanding is quite prominent. Harry has to understand the needs and behaviors of the creatures. Sometimes, the creatures are misunderstood by the wizarding community, and Harry is the one to bridge that gap. For instance, a seemingly dangerous creature might actually be gentle once Harry gets to know it better.
Often, there might be themes related to power imbalances in these types of fan fictions. In the context of Harry Potter, magic can create situations where one character has more power over another, which can be misused in a relationship. Also, themes of redemption for the abuser can be present. This is where the abuser realizes their wrongdoings and tries to make amends, similar to how some characters in the original series have moments of redemption. However, it's important to note that these themes should be explored in a way that doesn't glorify abuse.
One common theme is the struggle for acceptance. Harry, being in Slytherin where he might not be initially welcomed, has to fight for his place. And the abuse he faces adds to that struggle. Another theme is redemption. The romantic relationship can be a source of redemption for both Harry and the other character involved. For example, the Slytherin love interest might have their own issues and together they find a way to heal.