Although it's merely a Rank-5 Fire Yang Evil, for Chen Mobai, it's still a power he needs to cautiously refine.
Any power, as long as it reaches the Rank-5 level, even without a cultivator controlling it, is not something an ordinary Nascent Soul cultivator can touch.
Under Chen Mobai's Listening with Empty Valley Echo, he sensed the exceptionally violent nature of this Rank-5 Fire Yang Evil. If mishandled during the refining process, it could very likely backfire disastrously.
Fortunately, he had never refined the Primordial Yang Sword Evil into his body, so even if he failed, at most it would just cause the Sword Gourd to explode.
But according to Chen Mobai's genius character in the Immortal Gate, he definitely cannot fail.
