Blade and Soul’s source material is built on wuxia and martial arts fantasy, which gives authors a huge sandbox to play in. The established power systems—like the Hongmoon arts, the Dark Arts, or the different schools—are already pretty detailed, but the fun part is seeing how writers extrapolate from there.
I’ve read a lot where an author will take a minor character from, say, the Stratus Empire and invent a whole lineage of shadow techniques just for them, weaving it into the existing political conflicts. Others hybridize elements, like combining Lyn spiritualism with Kung Fu Master physicality to create something entirely new for an OC. The trick isn’t just making a power ‘stronger’; it’s making it feel culturally and personally rooted in that world’s logic.
My favorite fics are the ones where the unique power directly challenges the character’s morality or forces a trade-off, making the flashy moves actually matter to the plot.