#I'm also gonna screencap ep 5 of the donghua to analyze his fight scenes

[one-flower-one-sword]

His fingers curled into claws, and he aimed directly for Hua Cheng's right eye!

It all happened in under a second. Hua Cheng dodged just as fast, but the attack still left two bloody scratches on his cheek.

For the first time, Hua Cheng faced an opponent he couldn't overtake in speed. His gaze turned sharp, and he changed tactics on the spot - he called forth millions of wraith butterflies, and they swarmed the man in a frenzy. The myriad butterflies wrapped the white-clad man inside a large, shimmering silver chrysalis, but that likely wouldn't last long. Hua Cheng was about to grab Xie Lian when the silver butterflies shrieked and exploded into sparkling powder!

Seeing the subtle change to Hua Cheng's expression as so many wraith butterflies were destroyed at once, Xie Lian knew that this wasn't good. The white-clad man had blown apart the wraith butterflies, and now he was hidden within the shimmering silver powder that choked the air. His newly grown hand struck out once more, aiming again for Hua Cheng's right eye!

TGCF Volume 6, page 76

In this previous post, I've speculated about the logistics of Hua Cheng being blind on his right side and his usage of the wraith butterflies as a sort of disability aid in some instances. This above scene of his first direct clash against Bai Wuxiang is another one of those moments where the text isn't directly stating something but it's possible to extrapolate from what is described and from what is implied.

Hua Cheng is extremely skilled at direct combat at a very young age already, evidenced by the way he manages to injure several of Qi Rong's lackeys when they capture him as he's only ten years old:

"I called for five or six guys, and they still couldn't catch the brat. He trashed and bit them until they were bloodied all over."

Volume 2, page 351

And then later as a young soldier in the army:

"Although the boy was carrying nothing but a worn sword, he was still highly effective and struck down many of the binu. [...] "You've never used a saber before, right? You use a sword, but the sword is tricky. Although it's fast and extremely aggressive, its range is fairly limited. If you've never used a saber before, try it next time. I think you might be even stronger with it."

Volume 3, page 124-127

(The horrifying thing about this is of course that while Hua Cheng probably possessed natural talent, the reason why he had to learn to defend himself against adults as a mere child was that he was so severely and frequently beaten by them)

Also in my previous post, I speculated that Hua Cheng always keeping his right eye covered likely meant he learned early how to compensate for his blind spot in combat, since that obvious weakness is something his opponents would immediately notice and try to take advantage of. Until Bai Wuxiang, we never witness him fighting anyone who can actually injure him, not since he's become a Supreme Ghost King. He defeats 33 heavenly officials in a row, and even fighting two against one with Feng Xin and Mu Qing, he defeats both of them with ease.

I would argue that, aside from being extremely skilled with a saber and having immense spiritual powers, it can be extrapolated from the above quote about his fight against Bai Wuxiang that it's also Hua Cheng leveraging his superior speed against his opponents that prevents them from taking advantage of his blind spot.

(As an aside, I would assume that even when Hua Cheng is in a fake skin that has both eyes and not in his true form, he's still blind in the right one because it's, well, fake. If the text ever actually contradicts that (I've not read volume 8 yet) I will add corrections)

But now, he's facing Bai Wuxiang, who is just as if not even faster than him. Judging by the fact that Bai Wuxiang aims his attack at Hua Cheng's right eye twice, he's correctly judged his blind spot to be the most vulnerable place to go for, thereby managing to bypass his defense long enough to injure him.

Hua Cheng immediately reasses the situation, realizes he needs to create more distance between himself and his opponent, and switches to use his wraith butterflies as a sort of distract-defend-attack combo. And against everyone else, this would have worked - we see this when he uses them to drive Feng Xin and Mu Qing back after they kidnapped Xie Lian away from him:

The butterfly deluge was blocked by the formless spiritual shield and shattered into shimmering silver light, which rapidly recrystallized into new silver butterflies and attacked once more. The onslaught was completely unstoppable - Feng Xin and Mu Qing gave ground slowly as they kept their shields up, and Hua Cheng steadily advanced step by step.

Volume 6, page 63

And then again to keep Feng Xin away and occupied while he faces Mu Qing with Eming:

Meanwhile, each arrow Feng Xin shot at the butterflies was snapped by their sharp wings. The sheer number of butterflies was ultimately too difficult to deal with!

Volume 6, page 64

But Bai Wuxiang is infinitely more powerful and simply destroys all the wraith butterflies at once, which then gives him the opportunity to immediately go for Hua Cheng's blind spot a second time and aim his attack there again.

If we continue to read the wraith butterflies as not only a weapon but also a disability aid of sorts, these fight scenes demonstrate both the possible uses of them as such and also their limits. While they're feared for good reason and have multiple functions - acting as his eyes and ears like spies, defending like a shield or cutting like a blade - they can help him make up for his blind spot to a certain degree, but they can't erase it. They're an aid for his vision loss, not a replacement.

(Which is a good thing imo, just to make that clear. I feel like it's always such a wasted opportunity when characters sustain a disability and then it's either magically fixed or they continue on as if they're still able-bodied. But Hua Cheng is disabled, and the ways he's found to empower himself and to navigate a world that's pretty hostile to people like him, don't take away from that)

Like I mentioned above I haven't read Volume 8 yet, where as far as I know there'll be more fight scenes, so I might come back to this post in the future to add further observations or correct previous ones!