Naksu wakes up in a weak blind girl's body
Naksu's soul is now in Mu-deok, a blind girl who can somehow see; on the boat to the fortress she discovers the body has no strength at all.

Every Alchemy of Souls moment featuring Mu-deok, in story order. Played by Jung So-min.
233 moments · 9h 09m · by Favseen
Moments 1–30 of 233
Naksu's soul is now in Mu-deok, a blind girl who can somehow see; on the boat to the fortress she discovers the body has no strength at all.
The assassin who never eats meat devours chicken, only to find out the kindly man was delivering her to a brothel to pay a debt.
A brothel woman sizes up the skinny new girl, mistakes her strike for a dance, and gets silently added to Mu-deok's kill list.
Mu-deok learns of the four famed young heirs of the Jin, Park, Seo and Jang families, and quietly swears they will all die.
Caught stealing jewelry when Ju-wol realizes she can see, Mu-deok flees across the roofs and crashes into Uk, who praises her eyes and hands her his plaque.
Mu-deok wakes in Jang Gang's house as a servant Uk bought from the brothel, and decides he must have fallen for her.
Uk sends Mu-deok back and forth: too hot, too cold, smelly water, bad food, the wrong blanket.
Swearing Uk will be her first victim, Mu-deok wishes for a scrap of her old power, something stirs, and suddenly his bath is just right.
Hunting for the Spirit Plaque, Mu-deok hides in Uk's bed, claims she was warming it, and fears he wants her there all night. He only wants the brazier.
Masked intruders break into Songrim, the Training Center burns, Jeongjingak is emptied, and Mu-deok realizes her old master sent them.
Uk finds Mu-deok in the chaos, says her eyes gave her away, and wants the soul-shifting assassin to break his spell and teach him. She spares him.
After twelve failed masters, Uk explains how he knew her: the blue mark is in her eyes. He offers to hide her if she plays his servant.
Yul's blade finds the pair; Uk passes Mu-deok off as his maid, she grips the blade to protect him, and Uk scolds her glare.
Naksu's body is gone and a spy is suspected; Uk teases Mu-deok while the others discuss how soul shifters pick similar bodies.
Where her body was kept frozen, Uk names Mu-deok as the Shadow Assassin, laughs off a crush, and asks her to break his spell as his master.
Mu-deok refuses and threatens to kill him; Uk reveals they are sealed in Songrim's secret room, so she needs him to get out.
Mu-deok admits she needs her sword's energy to open his gate, Uk turns out to have lied, and both end up clinging to each other on a trap floor.
Everyone in Songrim is gathered and locked in while Jin Cho-yeon brings Gwigu, the Jin family's ghost dog that sniffs out sorcery.
Gwigu circles the room as Mu-deok waits to be exposed beside Uk, then lunges at another man who is a soul shifter and petrifies.
Uk catches Mu-deok slipping away, warns her about her glare, and leans in to show when the mark in her eyes becomes visible.
Gwigu turns up, Uk tells Mu-deok to run, and Cho-yeon finds her family's heirloom pottery smashed in his hands.
Mu-deok learns he broke the pottery to save her; the Songrim leader confronts Uk and forbids him from moving or speaking.
His friends explain to Mu-deok that Uk's gate of energy is opened just enough to keep him alive, and no one in Daeho may open it.
Mu-deok brings tea to the punished Uk, thanks the first person who ever tried to save her, and promises to spare him.
With firecrackers bought on Uk's name, Mu-deok has Ju-wol find a black-market buyer for the Spirit Plaque and orders more chicken.
Mu-deok's Spirit Plaque bait draws Cheonbugwan mages, who kill the woman who stole it, mistaking her for Naksu. The Danju has cut her off.
As Naksu's body burns before Cheonbugwan, she recognizes the Danju as Jin Mu and remembers the fire that took her family.
Uk brings Naksu's sword, but Mu-deok cannot pull it free; he tells her to live as Mu-deok, she says she would rather die, and he lets her go.
Mu-deok stands at the soul shifters' grave by the lake calling it hers too; Uk hears she headed for the lake and runs there shouting her name.
Uk got her treated and given eye drops; Mu-deok realizes the lake restored her power, so she needs someone with energy that strong.