I'm not sure of a specific 'Harry Potter has horns' fanfiction off the top of my head. But you could start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. Search for the keywords 'Harry Potter has horns' and you're likely to find some interesting stories. Some might be more focused on adventure, while others could be about self - discovery in the face of this strange new physical change.
There may be some fanfictions where Harry having horns is part of a larger plot related to a new form of magic that has been discovered in the wizarding world. It could be that his horns are the key to unlocking this new magic or they are a sign that he is a chosen one in a different way than in the original series. You might have to dig through a few stories to find one that really catches your eye, but it's definitely worth exploring the fanfiction community for such unique ideas.
One way to find a great 'Harry Potter has horns' fanfiction is to join some Harry Potter fan groups on social media platforms. There, you can ask fellow fans if they know of any good stories with this concept. They might be able to point you to some hidden gems that you wouldn't find just by doing a general search. Additionally, reading reviews and comments on fanfiction stories can also help you determine which ones are well - written and worth your time.
The best chapter pointer here is Chapter 106, "The Beginning of the Butterfly Effect". It opens with Thinking of this, He Yun nodded with a hint of anticipation. and closes on Jiang Li's fingers lingered over the three copper coins, her clear voice....
The best chapter pointer here is Chapter 80, "Princess Wen, Your Lunch is Escaping!". It opens with Jiang Yan and Wen Jiaojiao, one so smug he was almost ascending to the... and closes on arrogant princess with Princess Disease, I'm totally for it, fam.] [Hahaha....
If you want the clearest chapter reference, go to Chapter 86. Early on, After over an hour of fuss, it was finally time to eat.; later, the chapter leans on Qi Tianyu, starving, crazily scooped up his curry rice into his mouth..
If you want the clearest chapter reference, go to Chapter 104. Early on, Zhao Lang let out a light chuckle, "Young Master Jiang, don't be nervous,...; later, the chapter leans on You're Daddy's guests, how could I possibly come to settle scores with....
If you want the clearest chapter reference, go to Chapter 126. Early on, Wen Jiaojiao initially wanted to cause trouble.; later, the chapter leans on But when her gaze swept around and landed on Jiang Li, who was standing at....
Chapter 85 is the strongest chapter-level answer because it starts from Facing everyone's skepticism and curiosity, Jiang Li explained fluently:... and follows through on This fresh and vibrant flavor blended perfectly..
The best chapter pointer here is Chapter 84, "Is it Just About Having Hands?". It opens with When the villagers tasted his curry beef one by one, their faces revealed... and closes on Why am I tasting sand in my mouth?" Wen Jiaojiao's bravado gradually....
If you want the clearest chapter reference, go to Chapter 120. Early on, Facing the sudden and somewhat strange request from Jiang Li, Director Sun...; later, the chapter leans on But, as if by some mysterious force, he still instructed his assistant to....
If you want the clearest chapter reference, go to Chapter 139. Early on, Wen Jiaojiao's live stream was inundated with a wave of question marks.; later, the chapter leans on Princess Wen, what are you doing?.
Chapter 100 is the strongest chapter-level answer because it starts from The barrage was about to die of laughter. and follows through on Her eyes flickered slightly as she grabbed the hand.. The payoff is that the chapter closes with [I finally believe this show isn't scripted, it's too abstract.