Su Lingxiu's Golden Needles, though swift and powerful, are difficult to defend against due to their small size, as well as their formidable penetrating power, which ordinary martial artists' qi-blood would hardly withstand with ease.
Moreover, the Golden Needles are versatile; one might deflect a single needle, but cannot fend off ten, eight, or even hundreds to thousands of them.
However, for Xu Yan and Meng Chong, they posed little threat in the end.
Furthermore, since Su Lingxiu had comprehended the art of the Golden Needle with the two men's help, they already had an understanding of the needles' methods.
Meng Chong's Golden Body of the Great Sun didn't even require an intentional defense to make the Golden Needles incapable of breaching his guard.
For Xu Yan, Su Lingxiu's Golden Needles, though remarkable, posed no threat to him, not even the slightest, even though they were in the same realm.
The same held true even if Su Lingxiu resorted to a sneak attack.