Well, in this fanfiction, it could be that the legion of Ho - Oh has some sort of connection to the magic in the Harry Potter universe. It might be a story where the wizards have to deal with the power or mystery brought by the Ho - Oh legion. For example, they could be trying to protect Hogwarts from the unknown influence of these Ho - Oh creatures. There could also be some sort of prophecy or ancient magic that ties the two together.
I'm not sure specifically as it's a fanfiction. But it might combine the world of Harry Potter with the Pokémon Ho - Oh. Maybe it has Harry and his friends encountering the legion of Ho - Oh in some magical adventure.
The best chapter pointer here is Chapter 235, "Bungee Jumping in Ethiopia???". It opens with Chasing Wind Youth was clearly becoming anxious, and as a result, his... and closes on Indeed, he had endured many accidents while traveling around these past....
A practical answer is Chapter 226, because it turns the idea into a concrete scene. The chapter opens with What was all that before then?, adds pressure through The moment Jiang Li saw it, she confirmed her guess even more., and ends on Are you sure you can be on the list of winners?] Zhou Xu: [?.
If you want the clearest chapter reference, go to Chapter 197. Early on, Seeing that no one cared about what she said, Su Yinwan immediately felt...; later, the chapter leans on Then she wanted to attract everyone's attention back, looking directly at....
Look to Chapter 209 for the clearest answer. It begins with He Yun suddenly spilled out over a dozen cards., keeps building through He, you're really something, to have gotten so many good scores!" Wen..., and lands on While he, after a whole bunch of them poured out, ended up with only nine....
A practical answer is Chapter 246, because it turns the idea into a concrete scene. The chapter opens with At that moment, not only Su Yinwan but also Shang Shaojing's complexion..., adds pressure through Heh, I think he can't last even a second, he'll be making a fuss to leave..., and ends on.
The best chapter pointer here is Chapter 196, "I am the one with the most potential!". It opens with Wen Jiaojiao was on the verge of a breakdown. and closes on For example, Shu Yan drew the number 4." Director Sun tapped on the sign....
A practical answer is Chapter 216, because it turns the idea into a concrete scene. The chapter opens with The production team also took advantage of the situation to start an..., adds pressure through These past few days, she had been doing nothing out of the ordinary, so..., and ends on However.
A practical answer is Chapter 207, because it turns the idea into a concrete scene. The chapter opens with After finishing, Sister-in-law Lan quickly took out the Good Evaluation..., adds pressure through I didn't say I'd pay you for your work, did I?, and ends on She had taken care of them for a.
Chapter 213 is the strongest chapter-level answer because it starts from Jiang Cheng also noticed where Jiang Shixu's attention lay. and follows through on As soon as they were seated, Lin Manru picked up the public chopsticks,....