Maybe Harry is unable to perform basic spells because he's so coddled that he hasn't had the chance to practice properly. So, his friends have to constantly protect him from minor threats like a pesky pixie.
One possibility is that the Dark Lord Voldemort discovers that Harry is being babied and tries to use it to his advantage. He might think that a babied Harry is a weak Harry. But in the end, Harry's friends and the power of love still manage to save the day, but in a very different way from the original story. Maybe instead of Harry facing Voldemort directly, it's his friends who step in to fight while Harry is hidden away in a safe place, and they draw strength from their love for him.
Sure. One example could be that Harry is able to understand ancient runes and spells without any formal training. He just looks at them and immediately knows what they mean and how to use them. Another could be that he has an inborn ability to communicate with magical creatures in a way that no one else can, and he uses this to gain their help in battles or to solve problems in the wizarding world.
In this fanfiction, Harry could be a player in the sense of being a political player within the wizarding world. He might be secretly forming alliances with different wizarding families to gain power and influence. He uses his status as 'the boy who lived' to his advantage. In relationships, he could be a bit of a heartbreaker. He goes on dates with Hermione, Ginny, and other girls, but is never fully committed, causing some drama and tension among his friends and the girls themselves.
Maybe there are ice - based duels in Hogwarts where students use ice spells instead of the traditional ones. For example, instead of a Stunning Spell, they could have an Ice Bind Spell that freezes the opponent in a block of ice. And there could be a new area in Hogwarts, like an Ice Dungeon, where students practice their ice elemental magic.
Maybe her mutant ability is telepathy, which could make her really good at reading the minds of her enemies in the wizarding world. This could help her solve mysteries or avoid dangerous situations. At the same time, it could also cause problems if other wizards find out she has this power, as it might be seen as an 'unfair' advantage or something dark.
Sure. There could be fanfictions where the author completely misinterprets the relationships between characters. For instance, making Harry and Draco best friends from the start without any of the rivalry and tension that was built in the original series. Then there are those that have really bad pacing. They might spend too much time on unimportant details in the beginning and then rush through the important parts of the story like the climax. And sometimes, the worst ones have a very unoriginal plot. It's just a rehash of the original books but with some minor, uninteresting changes.
Sure. One example could be that Harry, as a feral mutant, has enhanced senses like super - sharp hearing and smell. He might use these to hunt for food in the wild, away from normal civilization. Another could be that he has some sort of feral appearance, like claws or fangs, which he uses to defend himself against those who would harm him.
Maybe Harry uses his wolf abilities to track down an enemy in the forest. His enhanced senses, like his sense of smell as a wolf, would be really useful for that.
There could be an increase in the number of Death Eater attacks on both Muggle - born wizards and wizarding families. For instance, they might start raiding small wizarding villages.
He might start by killing small animals in a really cruel way as a sign of his growing darkness. Then he could target people who have wronged him in the past.
Perhaps she might accidentally set off a series of magical explosions in the Hogwarts corridors while trying out a new spell she made up on the fly. This would lead to chaos as students and teachers scramble to figure out what happened and how to fix the damage.