In some fanfiction, the idea of 'Harry Potter drains life force' might be a very dark and unorthodox interpretation. It could be a plot device where Harry, perhaps under the influence of dark magic or some strange curse, starts to drain the life force of others. This could be used to show a corrupted version of his character or a new, evil power that he has to struggle with.
There may be some, but they probably aren't among the mainstream or widely - promoted fanfictions. Since the concept of Harry Potter draining life force is rather dark and not in line with the general tone of the original series, it might be more of a hidden or less - known type of fanfiction. You'd probably have to dig deep into some of the more edgy or experimental fanfiction archives to find them.
It could be a fanfiction where Harry Potter has some sort of power or situation that drains life. Maybe it's a dark take on his character where he's involved in something that sucks the life force out of people or things, but without reading it, it's hard to be certain.
You can try some popular fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. Just search for the exact title or related keywords on those platforms.
It depends on how it's presented. If it's just a creative exploration within the fanfiction world and not promoting harmful or unethical behavior in real life, it can be seen as okay.
One interpretation could be a dark twist on Harry's character. Maybe in this fanfiction, he's been corrupted by some dark magic that makes him steal life force to gain power. It could also be a misinterpretation of some powerful spell he uses that seems to drain energy, which is wrongly seen as stealing life force.
Maybe a new exchange student from a far - off wizarding world where the concept of the Force exists comes to Hogwarts. This student notices Harry's strong magical abilities and decides to introduce him to the Force, starting his learning journey.
The relationships in the story are also affected. His friends might turn against him if they discover he is stealing life force. For example, Hermione would likely be horrified and try to stop him. This changes the dynamics of their friendship. Also, the wizarding world would view him as a threat rather than a savior.
One challenge could be the conflict between the rules of magic he already knows and the new principles of the Force. For example, the way spells are cast in magic is very different from how one might use the Force, so he has to unlearn some habits. Another could be the opposition from some of the more traditional Hogwarts professors who see the Force as something foreign and potentially dangerous.
In this fanfiction, magic as 'the force' could mean that there are new ways of using it. Maybe instead of just waving wands and saying incantations, wizards can now use magic in a more fluid and internal way. Similar to how in Star Wars, the force can be used for things like mind tricks or enhanced physical abilities. Here, magic could be used for more than just the traditional spells. For example, a wizard could use this new understanding of magic as 'the force' to levitate themselves without a broomstick or communicate telepathically with other wizards. It could completely change the dynamics of how magic is used in the Harry Potter universe.