Dumbledore. He was known for his vast knowledge of magic and his ability to see things that others couldn't. He might have known about the existence of the Infinity Stones all along, but kept it a secret. Maybe he was waiting for the right moment or the right person to reveal their existence and use them for the greater good of the wizarding world.
Hermione Granger would also be a likely candidate. Her thirst for knowledge and her extensive research in the library might lead her to discover ancient texts about the Infinity Stones. Then she would go on a mission to find them, using her intelligence and magical skills to track them down.
The Infinity Stones could be linked to the Deathly Hallows. Maybe the Resurrection Stone has a connection to the Soul Stone. They could both have the power over life and death in different ways. And the other Infinity Stones could be related to the Elder Wand's power of domination and the Cloak of Invisibility's power to conceal, but on a much grander scale, if they were to be incorporated into the Harry Potter world.
In this type of fanfic, the Infinity Stones could have a very different effect in the Harry Potter universe. For example, the Time Stone could be used to reverse dark spells or resurrect fallen wizards. However, the Stones' power might also be limited by the magic rules of the wizarding world. The fanfic could delve into how the characters from both universes adapt to the presence of the Stones and how they use or misuse their power.
In a fanfiction where Harry Potter has the Infinity Stones, his life would take a completely different turn. First of all, the Space Stone would enable him to teleport anywhere in the wizarding world or even beyond. This would make it impossible for his enemies to catch him. The Soul Stone, on the other hand, might have some deep connection with the wizard's soul. Maybe it could help him understand the true nature of magic and his own destiny better. He could use all these stones' powers in combination to bring about a new era of peace and magic in the wizarding world, but he would also have to face the great temptation and potential corruption that comes with such immense power.
Well, he would probably become extremely powerful. He could use the Time Stone to go back and change certain events in the wizarding world, like preventing some of Voldemort's evil deeds. With the Power Stone, his magical abilities might be amplified to an unimaginable level, allowing him to defeat any dark wizard with ease.
One interesting plot could be that the Infinity Stones are the key to defeating Voldemort once and for all. Harry discovers that the Stones have the power to not only destroy Voldemort but also to repair the damage he has done to the wizarding world. However, the Ministry of Magic wants to use the Stones for their own gain and power. So Harry has to fight against the Ministry as well as Voldemort to get the Stones and use them for good.
In the 'Harry Potter has the Infinity Stones' fanfic, the whole wizarding world would be changed. Harry might use the Reality Stone to create illusions that are so real they could deceive even the most powerful wizards. With the Mind Stone, he could perhaps read the minds of his enemies and gain crucial information for his battles against the dark forces. And the Space Stone could help him teleport around the wizarding world, giving him an edge in both escape and surprise attacks.
Harry could use the Mind Stone to read the thoughts of his enemies, like Voldemort. This would give him an edge in the fight against the Dark Lord. Hermione might use the Time Stone to gain more time to study and find solutions to difficult problems, like how to defeat a powerful dark magic spell.
Sure, they exist. The comics have featured the Infinity Stones in various storylines, often with their powers causing major events and conflicts.
One interesting aspect could be the unique crossovers. For example, integrating the Infinity Stones into the Harry Potter universe can lead to new magical abilities and power dynamics. Maybe a character uses an Infinity Stone to enhance their Patronus or to break a powerful dark magic spell. It also allows for creative interpretations of how the different Houses in Hogwarts would react to the presence of such powerful and foreign objects.
The Infinity Stones could also change the magic system. In the Harry Potter universe, magic has certain rules and limitations. But with the introduction of the Infinity Stones, those rules could be bent or broken. For example, a character could use an Infinity Stone to perform magic without a wand, or to teleport across great distances without using apparition. This would create a whole new set of challenges and opportunities for the characters in the fanfiction.