Wo Long: Fallen Dynasty

This achievement unlocks upon beating the sub battlefield 'Guileless Mind, Tigerlike Might,' which is a duel of sorts against Xu Chu. It isn't your traditional duel because regular attacks don't interrupt like against human enemies. Instead, this plays like a traditional boss battle. And quite a challenging and annoying one at that. Xu Chu, in addition to being very strong, is extremely fast and relentless. There is just no downtime whatsoever between his attacks to actually attack him. Really, the only advice I can give is keep your distance, because you really don't want to get trapped by his swinging attack, and just bide your time until he does a critical blow. Deflect it, and wait and repeat for the next one.