What are some interesting spells that Harry Potter could invent in fanfiction?

In some fanfiction, the Engorgio spell is used in really creative ways. For example, it might be used to enlarge a hidden passageway to make it easier for characters to escape. Sometimes it's used on magical creatures to make them seem more intimidating during a battle.

One interesting spell is 'Wingardium Leviosa'. It is used to levitate objects, as we saw when Hermione taught it to Ron and Harry in their first year at Hogwarts. It's a very useful spell for moving things around without having to touch them.

One interesting spell is Wingardium Leviosa. It is used to levitate objects, which is very useful in many situations like moving heavy books or other items around Hogwarts.

Another spell is 'Expecto Patronum'. This is a very powerful and positive spell. It conjures a Patronus, which can be in the form of an animal. It is used to fight off Dementors, those dark and soul - sucking creatures.

Another spell is 'Expecto Patronum'. It is a very advanced and powerful spell. The Patronus takes the form of an animal and can protect the caster from Dementors.

One interesting spell is 'Expecto Patronum'. It allows a wizard or witch to conjure a Patronus, which can take the form of an animal. It is a very powerful defensive spell that can repel Dementors. Another one is 'Wingardium Leviosa', which is used to levitate objects. It's one of the first spells that students learn at Hogwarts.

In fanfiction, Harry could invent a spell to protect his mind from external intrusion. Considering all the times his mind has been targeted in the original series, this would be a very practical spell. He might also create a spell to enhance the growth of magical plants. Since he has had some experience with Herbology, this would be an area where he could contribute with his spell - inventing skills. Additionally, a spell to quickly repair broken magical items could be one of his inventions, as he has often had to deal with damaged or broken things in his adventures.

He might invent defensive spells. Considering his history of facing dark forces, he could come up with spells that protect against specific dark magic attacks, like a spell that creates an invisible shield against the Cruciatus Curse.

One spell Harry could create is a 'Lumos Maximus Amplificatus' which would create an extremely bright and long - lasting light, much stronger than the regular Lumos spell. This could be useful in very dark and dangerous places like the Forbidden Forest at night.

Another spell is 'Accio'. This summoning charm is useful for calling an object to the caster. For example, if you lose your wand, you can use 'Accio Wand' to get it back.