If we consider Harry Potter fighting Thanos in fanfiction, it's a clash of two very different universes. Harry has his wand and his knowledge of spells. He could try to transfigure Thanos into something harmless, but Thanos' willpower might resist such magic. The Time - Turner could also be a factor if Harry could use it to his advantage, perhaps going back in time to prevent Thanos from getting the Infinity Stones. But Thanos' brute force and his army could pose a great threat to Harry. It would be a battle that would depend on Harry's quick thinking and ability to adapt his magic to this new and powerful enemy.
Harry would probably start by trying to understand Thanos' powers. He might use his invisibility cloak to get closer and assess the situation. Then he'd likely use some of his most powerful spells like Avada Kedavra, but it might not be as effective against Thanos as it is against normal foes.
There would be a clash of two very different power systems. Harry's magic might initially confuse Thanos. Thanos, on the other hand, with his brute strength and the Infinity Stones, would be a huge threat to Harry. Maybe Harry would try to find a magical way to neutralize the power of the Infinity Stones. For example, he could use a spell that disrupts magical or non - magical energy sources. It would be a battle of wits as well as power.
Well, in a Harry Potter x Thanos fanfiction, Harry could potentially use the Time - Turner (if it still exists in this scenario) to outwit Thanos. He might go back in time to prevent Thanos from getting the Infinity Stones. But Thanos is no fool. He'd be aware of such time - tampering and would likely have counter - measures. Maybe he'd use the Reality Stone to create illusions and deceive Harry. It would be a battle of wits and power where both characters would have to push their abilities to the limit.
If Harry Potter fights Imhotep in fanfiction, Harry would likely start with his go - to spells. He might try a Stunning Spell or a Shield Charm. Imhotep, on the other hand, would probably use his powers of necromancy. Harry would be at a disadvantage in terms of not being used to dealing with an enemy who can raise the dead. However, Harry has the advantage of speed and agility in combat, which he has learned from his years at Hogwarts. So it would be a very interesting fight to read about.
Well, if Harry Potter were to fight the Hulk in fanfiction, Harry would likely be at a disadvantage initially. The Hulk's brute strength is on a whole different level. But Harry is smart and resourceful. He might use his invisibility cloak to get close and then hit the Hulk with a powerful blasting curse. The Hulk, though, would probably just get angrier and more powerful. It would be a really interesting battle to read about, with magic vs raw physical power.
In this fanfiction, Harry might use his magical skills like the Patronus charm to fend off the dragon. Maybe he'd also rely on his broomstick flying skills to dodge the dragon's attacks.
In a fanfiction scenario where Harry Potter fights the Night King, it could be a very interesting battle. Harry has his magic skills like the Patronus charm which could potentially be used against the Night King's army of the dead. However, the Night King is extremely powerful and has the ability to raise the dead. Harry would need to find a way to counter this, perhaps by using powerful offensive spells like the Killing Curse. But he would also have to be careful not to get overwhelmed by the sheer number of the Night King's forces.
A Harry Potter who reverses Thanos would be a very interesting concept. Harry could use his ability to communicate with snakes (Parseltongue) to perhaps take control of some of Thanos' minions. His magical items like the Invisibility Cloak would give him an advantage in stealth. He might even use the Time - Turner to go back in time and prevent Thanos from getting the Infinity Stones in the first place. The Hogwarts environment could also be a factor, with its many secrets and magical defenses that could be used against Thanos.
Maybe Harry Potter could stop Thanos with the help of his friends. Hermione's intelligence could come up with a plan. They could use time - turners to go back in time and prevent Thanos from getting the Infinity Stones in the first place. Ron could be there for moral support and also use his chess - playing skills to outwit Thanos in some strategic battles.
In a fanfiction where Harry Potter fights Sauron, Harry would be at a disadvantage in terms of raw power. Sauron is an ancient and extremely powerful being. However, Harry has his courage and quick thinking. He could use his ability to solve mysteries and puzzles. He might figure out a way to destroy the One Ring, which would be a huge blow to Sauron. But it wouldn't be easy as Sauron would be constantly trying to stop him.