One possible plot could be that Harry discovers his unique connection to Lady Magic early on. This newfound knowledge gives him even greater power and a different perspective on his battles against Voldemort. He might be able to access magic in ways that others can't, and use it to protect his friends more effectively.
In such a fanfiction, perhaps Harry would grow up with a different kind of magic. Lady Magic could endow him with unique powers. He might have a more in - depth understanding of magic from a very young age, and his relationship with the magical world could be more profound than in the original story.
Harry's character could develop into a more serene and centered individual. Lady Magic's influence could instill in him a sense of calm and purpose. He would not be as easily rattled by the challenges that come his way. For example, he might face Voldemort with a different kind of confidence, not just the courage that comes from his friends and Hogwarts, but from his own deep - seated connection to the very source of magic. This could also make him more empathetic towards magical beings, as he would understand the magic within them on a deeper level.
The Death Eaters could still be the main antagonists. Even though Harry has this new connection to Lady Magic, the Death Eaters, loyal to Voldemort, would see him as a major threat to their dark plans and would continue to try to kill him.
One common theme is redemption. Slytherins are often seen as the 'bad guys' in the original series, so protecting Harry gives them a chance at redemption. For example, they might be trying to make up for past wrongs or the actions of other Slytherins.
Well, perhaps Harry uses his magic skills like the Patronus charm to fend off the White Walkers approaching Winterfell. His ability to apparate could also be useful in quickly moving around the castle during the battle.
One way is through distraction. The snake could draw the attention of Harry's attackers away from him. It could slither towards the bad guys and make menacing hisses, causing them to focus on the snake instead of Harry.
One popular 'Harry Potter Slytherin protects Harry' fanfiction is 'The Slytherin's Vow'. In this fic, a Slytherin student, often overlooked due to house stereotypes, realizes Harry's importance and decides to protect him secretly. Another great one is 'Slytherin's Shield'. Here, a group of Slytherins form an alliance to safeguard Harry from various threats within the wizarding world.
The Dark Lady in Harry Potter fanfiction could be a variety of things. It could be a long - lost relative of a major character who has turned to the dark side. For example, she could be a distant cousin of the Malfoys who has her own agenda in the wizarding world that involves dark magic. She might also be an entirely new creation who fills a role that wasn't explored much in the original series, such as a female dark wizard who challenges Harry and his friends in ways different from Voldemort.
Yes, in some Harry Potter fanfictions, there might be the concept of a 'god of magic'. Authors often take creative liberties to introduce such powerful and otherworldly entities to add new layers of mystery and power dynamics to the wizarding world they're building upon the original Potterverse.