You could try using relevant keywords and filters on search engines. And don't forget to read reviews and comments to determine the quality of the fanfiction you come across.
One way is to search on specific forums or communities related to 'How to Train Your Dragon'. Members often recommend their favorite night light fanfiction there. Also, check social media groups for suggestions from fellow fans.
The best chapter pointer here is Chapter 290, "The Jiang Family is to be Destroyed". It opens with It was nearly evening when Jiang Li checked into Beijing Hospital. and closes on However, just as they were slandering and framing her, Jiang Li's Weibo....
If you want the clearest chapter reference, go to Chapter 270. Early on, After liking the post, Jiang Mingyu put his phone away and turned back to...; later, the chapter leans on The Ethiopian police had already investigated the attempted murder case....
The best chapter pointer here is Chapter 286, "I Won't Let Anything Happen to Either of Us". It opens with Throughout these reincarnations, Zhao Lang had gradually discerned a... and closes on From her understanding, the world they were in was like a book, where....
Chapter 260 is the strongest chapter-level answer because it starts from Yan Dabiao, who deeply felt the sting of deception, flew into a rage and... and follows through on However, if this situation arises again, you can't act so rashly..
The best chapter pointer here is Chapter 219, "Five Thousand Jin??!!". It opens with Qi Tianyu was somewhat freaking out. and closes on Having any yield at all was already the show giving them face..
The best chapter pointer here is Chapter 270, "Heavenly God Jiang Yu Returns?!". It opens with After liking the post, Jiang Mingyu put his phone away and turned back to... and closes on A moment later, he stood up, his expression returning to cold calm..
A practical answer is Chapter 231, because it turns the idea into a concrete scene. The chapter opens with Huo Xuan felt a burst of secret delight in her heart., adds pressure through My apologies, my apologies." "Does the bigwig want his fortune told too?"..., and ends on A cool sports car was.
The best chapter pointer here is Chapter 253, "She Hit My Head Three Times, I Hit Hers Seven Times". It opens with Wen Jiaojiao immediately lost her composure, leaping up from the bed and... and closes on Everyone fell silent after seeing their unyielding high scores tonight..
A practical answer is Chapter 250, because it turns the idea into a concrete scene. The chapter opens with The knowledge that several guests were soon returning had fans arriving at..., adds pressure through Not seeing me for so many days and not even asking how I am, you think—"..., and ends on.
If you want the clearest chapter reference, go to Chapter 282. Early on, The other villagers quickly heard the commotion and hurried over.; later, the chapter leans on By the time the village chief was alerted and ran over with others, the....