Fengxi is, like Zhuyan before it, a fairly straightforward boss in Wo Long: Fallen Dynasty. Because there are not a lot of moves in its repertoire and it telegraphs all of its attacks in a very obvious way, it is actually a very straightforward boss to fight. Once you see through Fengxi’s attack patterns, you should not have much trouble with it.
Like Zhao Yun says as soon as the fight starts, Fengxi likes to charge about and you can definitely use this to your advantage. Not only is this very easy to parry, but even if you do not deflect Fengxi’s charge, it can sometimes ram itself right into a wall. If you have Absorb Vitality, this is the perfect chance to restore any lost HP. Otherwise, you can take this opportunity to attack it as much as you like. It doesn’t stay down for very long, so keep alert for when it recovers.
Fengxi has a Morale of 20. This means that you should have around that number as well if you wish to fight on equal footing. Like all of the other bosses in Wo Long: Fallen Dynasty, however, you do not necessarily need to go grind for Morale just to prepare for Fengxi. Morale is more to reduce the damage per hit and increase your own attack. But if you would prefer a challenge, then Fengxi is perfectly defeatable even when you are at the minimum Morale.
Once you get Fengxi to half health, it starts adding more moves into its repertoire. It has several attacks where it launches itself at you, either after a jump or after a bit of a waddle. There is also one where it bucks about, creating shockwaves that you can parry. It’s safer to keep your distance for this one, though. Incidentally, Zhao Yun is, like how he was in the Zhuyan fight, fairly useless. But you can definitely use him as a meat shield or decoy of sorts.
To quickly summarize, Fengxi’s main sources of damage come from its charging attacks and its lunging shockwaves. While you can avoid its rampaging moves by simply keeping your distance, you should actively attempt to deflect its charges. Its movements are fairly slow and you can easily deplete its Spirit Gauge with a successful parry. You can also angle yourself so that it hits a wall, which will knock it out. If you keep that in mind, then you should have little trouble defeating Fengxi.
Wo Long: Fallen Dynasty is readily available on the PS4, PS5, Windows PC, Xbox One, and Xbox Series X.