How did you find this? Do you inspect element every article you read? I wonder how you would test if this works because I would add it to my website if it does.
I use Brave browser's Speedreader for reading articles, which rendered the dragon line to me as the first sentence, hence why I took a look at the HTML source.
I use miniflux to consume HN via RSS feed and that text was at the top of the article when I opened it.