I'm not sure specifically as I haven't read that particular fanfiction. But generally, in the Harry Potter universe, a 'paid in blood' concept could be something very dark. It might involve a character having to sacrifice something extremely precious or endure great pain (like blood being a symbol of sacrifice) for a certain goal, perhaps related to magic, power, or saving someone.
Fanfiction can take many directions. In the case of 'harry potter paid in blood fanfiction', it could be about a situation where Harry Potter himself has to pay a heavy price, symbolized by blood. Maybe he has to make a deal with a dark force where the cost is his own blood in order to gain some knowledge or power to defeat Voldemort. Or it could be about a different character in the series who uses blood as a form of payment in a magical transaction, which then has far - reaching consequences for the plot and other characters.
The best chapter pointer here is Chapter 53, "Save People!". It opens with Night had fallen over Chixia Village, eerily void of any human sounds. and closes on Wait, did this kid accidentally fall into the water?] [Help, this camera....
If you want the clearest chapter reference, go to Chapter 56. Early on, Lei Shen originally had no idea about the trending topics on Weibo.; later, the chapter leans on He had been busy renovating his studio for a while and hadn't even had....
Chapter 56 is the strongest chapter-level answer because it starts from Lei Shen originally had no idea about the trending topics on Weibo. and follows through on At this moment, Lu Xingchao was still in the dark..
If you want the clearest chapter reference, go to Chapter 88. Early on, She wanted to refuse, but didn't have the courage to do so.; later, the chapter leans on The Chen'an Entertainment she worked for was currently the largest....
The best chapter pointer here is Chapter 85, "They must have been bought off by Jiang Li!". It opens with Facing everyone's skepticism and curiosity, Jiang Li explained fluently:... and closes on This fresh and vibrant flavor blended perfectly..
A practical answer is Chapter 49, because it turns the idea into a concrete scene. The chapter opens with My phone!!!" Jiang Yan's roar echoed continuously through the mountains in..., adds pressure through The guest with the highest score will receive a series of resources from..., and ends on.
Chapter 60 is the strongest chapter-level answer because it starts from What's with Jiang Yan, treating his own sister Jiang Li like this?" "He... and follows through on And in traditional characters?" "What else?.
A practical answer is Chapter 106, because it turns the idea into a concrete scene. The chapter opens with Thinking of this, He Yun nodded with a hint of anticipation., adds pressure through The Jiang Family fell from grace, shattered into pieces, and became an..., and ends on Jiang Li's fingers.
Look to Chapter 86 for the clearest answer. It begins with After over an hour of fuss, it was finally time to eat., keeps building through Qi Tianyu, starving, crazily scooped up his curry rice into his mouth., and lands on But then her expression became resolute and arrogant..
A practical answer is Chapter 55, because it turns the idea into a concrete scene. The chapter opens with Su Yinwan hadn't expected that, in just one day, Jiang Li's reputation had..., adds pressure through This person was even a top gaming streamer with tens of millions of fans,..., and ends on.