Obviously, Harry Potter is the main character. He is the one who is learning the Dark Arts. Then there might be his friends like Hermione Granger and Ron Weasley. They could be either supporting his new path or trying to stop him. There may also be new characters created specifically for the fanfiction, such as a secretive Dark Arts master who takes Harry under his wing.
In some 'Harry Learns the Dark Arts' fanfictions, there could be a plotline where Harry uses his newfound knowledge of the Dark Arts to fight against a new, more powerful dark wizard. He might have to walk a fine line between using the Dark Arts in a 'good' way and succumbing to its evil nature. His adventures in this regard could include learning how to counteract dark spells with his own dark - art - based magic, all while trying to keep his soul intact.
A unique plot could be that Harry gets transported to an alternate magical realm where martial arts are the main form of magic. So instead of using wands, spells are cast through precise martial arts movements. He has to learn these new skills quickly to survive and find his way back to his own world.
One possible plotline could be Harry's internal struggle. As he learns dark magic, he has to battle his own moral compass. He might question the boundaries of good and evil. Another could be how his relationships change. His friends might be horrified or try to save him from the dark path.
It could be about Harry Potter learning some long - forgotten or lost magical arts. Maybe he discovers ancient spells, potion - making techniques that have been lost for centuries, or unique forms of divination that are no longer practiced in the wizarding world.
The Dark Arts in Harry Potter fanfiction are fascinating as they can change the whole dynamic of the story. They can create new villains or give old characters a darker side. Fanfiction authors might use the Dark Arts to create alternate storylines where Hogwarts is in more danger than ever. It gives a chance to see how different characters would react to a more prominent and menacing presence of Dark Magic.
Snape is a character that could play a major role. Given his past with dark magic, he might be a reluctant mentor to Harry, guiding him in understanding the power and danger of it. Dumbledore, too, would likely be in the story, as he is always concerned about Harry's well - being and actions.
Yes, it can be considered dark and controversial. Blood magic in the Harry Potter universe is often associated with dark and unethical practices. It goes against the principles of the good magic that Hogwarts teaches. For example, the use of blood in dark spells is seen in the actions of Voldemort. In fanfiction, having Harry Potter learn blood magic is a deviation from his character's usual moral stance, which can stir up a lot of debate among fans.
Bellatrix Lestrange could be a potential focus as a dark arts master in fanfiction. She already has a deep knowledge of the dark arts in the original series. Fanfiction could explore her even more, perhaps showing her training others in the dark arts in a more in - depth way.