He might have lost his main means of casting spells. This would put him at a great disadvantage in any magical battles or challenges. Without his wand, he would have to rely on other forms of magic or his natural abilities, which could be much more difficult.
Perhaps it was related to some new and untamed magical ability within Harry. For example, if he discovered a hidden power within himself that was too much for his wand to handle. His wand, which was made for normal magical use, couldn't withstand the intensity of this new power, and thus shattered.
He might face backlash from his own side. His family or the other Death Eaters, if it's set in that kind of context, could view his act as betrayal. They would likely be angry with him and might try to punish him in some way.
He might choose a phoenix feather because it represents rebirth and magic. And for the wood, perhaps he'd pick holly, which is often associated with protection in the wizarding world.
He might choose holly. In the original series, Harry's wand has a holly wood. Since he's making his own in this fanfiction, he could still be drawn to it for its traditional associations with protection and courage.
In fanfiction, if Harry Potter snaps his wand, he might lose a great deal of his magical power. His wand is his primary tool for casting spells, so without it, he'd be in a very vulnerable position. He could start to explore alternative forms of magic or seek out a new wand, perhaps through some extraordinary adventure. This could also lead to him relying more on his friends and the skills he has developed outside of wand - based magic.
If Harry Potter snapped his wand in fanfiction, it would be a huge turning point. Maybe he'd start a journey to repair it, like finding some ancient magic or a powerful wizard who could fix it. Or he could discover latent powers within himself that didn't rely on the wand. It would be a great opportunity for the writer to explore different aspects of Harry's character and the magic world without the typical wand - based magic.
The power of the Thunderbird wand could be associated with speed and flight. It might allow the wielder to move at incredible speeds, almost as if flying through the air without a broom. This could be useful in escaping dangerous situations or quickly getting to a far - off place. Additionally, it may have the power to communicate with Thunderbirds, getting their assistance in times of need.
In fanfiction, his wand could potentially be used to reveal secrets. Snape was full of secrets himself. Maybe his wand could be a key to unlocking hidden chambers or revealing long - lost knowledge. It could be used to decrypt old spells or manuscripts that were crucial to the wizarding world's history.
If Harry Potter snapped his wand in fanfiction, one possible scenario is that he would need to find a way to repair it. There are many magical creatures and objects in the wizarding world that could potentially help with that. He might search for the Phoenix whose feathers are used in his wand, hoping it could assist in mending it. Another possibility is that this event could be a turning point in the story where he realizes that his true power doesn't solely lie in his wand but within himself. So he could start to train in magic that doesn't require a wand, like wandless magic that some powerful wizards are known to perform.
The story would change drastically. Harry would be without his main means of magic. His enemies might take advantage of this. For example, Voldemort would see it as an opportunity to attack. Harry would have to rely on his wits and the magic he can do without a wand, like some basic spells he might have learned instinctively. His friends would also be more protective of him, and they might have to work harder to keep him safe.