It's a very interesting concept. If Harry Potter got an Infinity Stone in fanfic, his relationships with other characters would also be affected. His friends might be in awe of his new power, but also a bit afraid. Hermione, for instance, would probably be very cautious about how he uses it. And the Ministry of Magic would surely view him as a huge threat, leading to a whole new set of conflicts. He would have to learn to control this new power while still staying true to his values.
He might become extremely powerful. The Infinity Stones have the power to manipulate reality, time, space and more. Harry could use it to defeat Voldemort in a much easier way. For example, with the Time Stone, he could go back in time to prevent certain events that led to Voldemort's rise or stop him from ever being born.
A practical answer is Chapter 88, because it turns the idea into a concrete scene. The chapter opens with She wanted to refuse, but didn't have the courage to do so., adds pressure through Jiang Yan immediately stepped forward, "I have one point, quick, quick,..., and ends on Let's go," Jiang Li.
If you want the clearest chapter reference, go to Chapter 76. Early on, Thinking of this, the aunt repeatedly praised, "Girl, hearing your words...; later, the chapter leans on I'll go back and tell this to my child; he will definitely be motivated to....
A practical answer is Chapter 74, because it turns the idea into a concrete scene. The chapter opens with Having seen Jiang Li's ID before, he knew that this person named Shiguang..., adds pressure through It's not just a banner we are talking about;
Chapter 81 is the strongest chapter-level answer because it starts from Qi Tianyu, who chose curry beef rice, received a piece of curry and a... and follows through on The summer on the Southwest Plateau is no joke; the sun at three o'clock....
Chapter 78 is the strongest chapter-level answer because it starts from He Yun, too, tidied up and walked over to rest in the shade of a tree. and follows through on [HAHAHA, is it just me or does Movie Emperor He seem to be showing off a....
The best chapter pointer here is Chapter 79, "Finally, I'm not the last one anymore!". It opens with Jiang Li leisurely said, "I bought this weeding machine, and according to... and closes on Um..." Wen Jiaojiao bit her lip, "Could you, could you lend me the weeding....
Look to Chapter 77 for the clearest answer. It begins with Wen Jiaojiao's reminder calmed Shu Yan down., keeps building through Indeed, the wild mushrooms on the Southwest Plateau were complex in..., and lands on But who knew that the next second, the lottery box would be handed over to....
Chapter 80 is the strongest chapter-level answer because it starts from Jiang Yan and Wen Jiaojiao, one so smug he was almost ascending to the... and follows through on arrogant princess with Princess Disease, I'm totally for it, fam.] [Hahaha....
A practical answer is Chapter 93, because it turns the idea into a concrete scene. The chapter opens with Jiang Li looked back and saw several aunties linking arms, walking up the..., adds pressure through Even if they were hiring actors, could they really come up with such an..., and ends on I.
If you want the clearest chapter reference, go to Chapter 73. Early on, Director Sun, tongue-tied, finally managed to squeeze out a sentence,...; later, the chapter leans on But isn't it due to your production team's lack of consideration?.