'A Healer's Mercy' quest walkthrough in Phantom Blade Zero

To achieve the objective of A Healer's Mercy in Phantom Blade Zero, four lost thieves need to be located and their wounds treated with Yu'er's medicine. These thieves can be found within the Crimson Forest, the second region of the game. Yu'er, the healer, is initially encountered at the Thieves Camp, which is situated halfway through the Crimson Forest after defeating Jing Ye, The Outlaw.

The first thief, Li, can be found by teleporting to the Outlaw Trap bell and entering the cave to the west. Li is discovered behind blue flowers in this cave. The second thief, Zhou, requires obtaining the Crimson Forest Tunnel Crank, which is located at the end of a cave system behind Li's location. Upon returning to the Outlaw Trap bell, inserting the crank into the stone mechanism opens a hatch leading to Zhou, found near a table in the Crimson Forest Tunnel.

The third thief, Gui, is located in the Thieves Camp Dungeon. To reach this location, start at the Thieves Camp, then head northwest, passing the Red Serpent House and the Cliff of Longing. Arriving at the Cliffside Lodge's basement reveals an orange glowing item known as the Thieves Camp Dungeon Key, hidden on a corpse at the tunnel's entrance. This key is essential for accessing the fourth and final thief.

Inside the Thieves Camp Dungeon, after using the Thieves Camp Dungeon Key found in the tunnel outside, Gui can be found behind the camp's entrance. Upon providing medicine to all four thieves, Yu'er's quest for A Healer's Mercy is complete, rewarding the player with the Calming Gourd accessory.