You can try some popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of Warhammer - related fanfics, so there's a good chance of finding Vampire Counts vs Dark Eldar stories there.
Fanfiction.net is also a place to look. Just use the search function and type in 'Vampire Counts vs Dark Eldar'. However, the quality may vary, so you might need to dig a bit deeper to find the really good ones. There could be some stories that focus on epic battles between the two factions, with detailed descriptions of their unique abilities and tactics.
Another option is to check out some Warhammer - focused forums. Some fans might share their own fanfictions or recommend ones they've read. These forums can also be a great place to discuss the Vampire Counts and Dark Eldar in the context of fanfiction, like what kind of crossovers or plotlines would be interesting. For example, a story could involve a Vampire Count making a deal with a Dark Eldar to gain an advantage in a larger conflict within the Warhammer universe.
If you want the clearest chapter reference, go to Chapter 111. Early on, The main room's door was pushed open just a crack, and the head of the...; later, the chapter leans on Miss Jiang, you're still up, that's great..
A practical answer is Chapter 130, because it turns the idea into a concrete scene. The chapter opens with This task, the first one, should have been his in the bag., adds pressure through Not to mention Wen Jiaojiao, who was still lying in the hospital on an IV..., and ends on Normally, the best.
A practical answer is Chapter 120, because it turns the idea into a concrete scene. The chapter opens with Facing the sudden and somewhat strange request from Jiang Li, Director Sun..., adds pressure through Netizen: Wen Jiaojiao had been acting for years without much fame, but now..., and ends on.
Look to Chapter 152 for the clearest answer. It begins with While most of the villagers of Chixia Village were gathered at the village..., keeps building through The unassuming structure stood out oddly against the backdrop of its..., and lands on That shouldn't be." Zhao Lang's eye color.
A practical answer is Chapter 131, because it turns the idea into a concrete scene. The chapter opens with Just around mealtime, Director Sun came over pushing his small food cart., adds pressure through Just as they tried to emulate Jiang Li's example and make themselves a..., and ends on Hungry.
Chapter 138 is the strongest chapter-level answer because it starts from Is there such a good deal? and follows through on Could it be that the poison also had a side effect of making a person more....
Chapter 157 is the strongest chapter-level answer because it starts from It was already the last day of Flash Change in his dream. and follows through on I'm laughing myself crazy, do actors all have such strong conviction?]....
Chapter 154 is the strongest chapter-level answer because it starts from Hahaha, I'm dying of laughter, Lili, do you really have to be so blunt?"... and follows through on Helplessly, Director Sun could only grit his teeth and add another 5....
If you want the clearest chapter reference, go to Chapter 146. Early on, Director Sun: "???" Jiang Li smiled and said, "In the past, the show crew...; later, the chapter leans on But most of the dishes tonight are made by the villagers..