In Chapter 3 of Black Myth: Wukong, you can encounter a corpse that turns you into a fox. It wants you to find the monk who killed it. This is a little side quest that leads to a hidden boss.

Step 1: Talk to the Fox Spirit
Location: Valley of Ecstasy > Forest of Felicity – Directly in front of this shrine is a gate, on the right side of the gate is a corpse. Talk to it 3 times, a fox spirit will jump it and you get the item “Snow Fox Brush”. The fox asks you to find his killer, a monk in the New Thunderclap Temple.

Step 2: Find the Monk while in Fox-Form, defeat him
Location: New Thunderclap Temple > Temple Entrance – Follow the path straight ahead until you reach a red barrier with the boss “Captain Kalpa-Wave”, defeat him. Then you will enter the “New Thunderclap Temple”. This is mandatory story area, you can’t miss it. From the “Temple Entrance” shrine, go straight forward through the next temple, then go up the stairs, then take the left path downstairs, go straight ahead into next building, inside the building go upstairs, from there you can go upstairs over a wooden bridge to a temple. Inside you find the monk you’re looking for. You have to be in fox form to trigger a cutscene and the “Non-Void” boss fight. From the inventory use “Snow Fox Brush” (which was given by the corpse in Step 1). This transforms you into the fox while out of combat. After the cuscene defeat the monk. Cast Pluck of Many > Immobilize > keep using quick attack to deal damage fast > also use your Spirit attack and Transformation spell when your clones go away. The boss can be tricky to hit but if you’re sufficiently leveled you can defeat him fast. Also consume medicine to buff yourself before the fight. As a reward you get the Non-Void spirit.

Step 3: Return to quest giver
Location: Valley of Ecstasy > Forest of Felicity – Return to the quest giver, the corpse from Step 1. Talk to it again to get the “Snow Fox Brush” Curios (accessory), which makes your transformations last longer.