Songrim and Cheonbugwan clash before the king
The king considers promoting Jin Mu for killing Naksu's men; Songrim objects, and Jin Mu asks to burn Naksu's body and keep her sword.

Every Alchemy of Souls moment featuring Jin Mu, in story order. Played by Jo Jae-yun.
86 moments · 3h 17m · by Favseen
Moments 1–30 of 86
The king considers promoting Jin Mu for killing Naksu's men; Songrim objects, and Jin Mu asks to burn Naksu's body and keep her sword.
Uk claims the sword in his father's name; Jin Mu says an ordinary man cannot even draw it, and Uk lets a pointed 'for now' hang.
As Naksu's body burns before Cheonbugwan, she recognizes the Danju as Jin Mu and remembers the fire that took her family.
Jin Mu feeds a wild soul shifter human souls, then recalls the day the king summoned him and revealed he was Jang Gang trapped inside.
Jin Mu praises the prince's swordwork, mentions Uk's open gate and the sword he took, and the prince takes the slight personally.
News that Gwigu was stolen from Jinyowon, which only the Jin family can open, sparks a bitter exchange with the illegitimate Assistant Gwanju.
Master Heo's plea backfires: Jin Mu wants Uk's sword arm cut off, then proposes an official duel with the Crown Prince.
Mu-deok recalls her father, a Cheonbugwan star recorder killed by the four families, and growing up hard in Danhyanggok after following Jin Mu.
The soul shifter was a Cheonbugwan star recorder, so Jeongjingak mages search the office and ask to see its secret room.
Jin Mu scolds a man whose soul he shifted into a powerful body, plans to move him into a eunuch next, and says it serves Her Majesty.
The Cheonbugwan Assistant Gwanju, scorned by his half-sister, urges her to cancel Uk's marriage and promises the Crown Prince and help finding Bu-yeon.
At Cheonbugwan, Songrim's leader hears that Naksu's father was a soul shifter and is shown the hidden star plate from the night Jang Uk was born.
Plotters discuss the King's Star and Jang Gang's sealed ice stone, how young Bu-yeon found it, and a scheme to plant a false daughter on Jinyowon.
The Jinyowon leader recalls her missing eldest daughter, blind yet gifted with relics, and her vow to find her, while Jin Mu's secret visit is noticed.
Park Jin wants Master Kang's body examined for sorcery before cremation; Jin Mu objects and Lady Jin sides with him.
Jin Mu tells Ho-gyeong a drowned girl may be Bu-yeon; nearby So-i studies her future family and decides to look more pitiful.
At the cremation Park Jin has Yul pour energy into the body; it turns out to be a soul shifter, and Songrim claims the case.
Park Jin confronts Jin Mu over the cover-up, then the rampaging soul shifter fights until Cheonbugwan strikes it down.
Jin Mu reminisces with Maid Kim about serving Jang Gang and asks to share biscuits with Uk; Park Jin refuses and sends him away.
A eunuch asks to be shifted into the girl posing as Bu-yeon; Jin Mu remarks on facts that still sting, like his past begging for food.
The eunuch protests he was promised a new body, but Jin Mu makes him run wild; his men are ordered to find him before morning.
Hunting the rogue eunuch, Jin Mu draws out Uk, who explains his honey-biscuit errand and introduces Mu-deok.
Uk and Mu-deok spot the rampaging eunuch and try to escape, but Jin Mu blocks their exit and seals Uk inside a barrier.
Jin Mu offers Mu-deok to the rogue eunuch as food and steps outside, leaving her to face it while Uk is trapped in the barrier.
Jin Mu guesses Uk is hiding rather than lost and threatens to ring the room with fire; Uk taunts him from cover.
Cornered, Uk reveals he charged the twin of the Crown Prince's jade and hid it on the petrified eunuch, so the prince is coming.
The Crown Prince arrives and demands Jin Mu explain the soul shifter eunuch and why Uk and his maid were nearly killed.
Park Jin offers a flimsy reason for Uk's visit, Uk accuses Jin Mu of hiding a soul shifter, and the Crown Prince orders a check on the eunuch.
The Queen brings Eunuch Kim in, apparently unharmed, and Uk realizes the ice stone revived him, so he takes the blame and calls it all a lie.
Park Jin apologizes and offers to fix the basin; when Jin Mu insists on punishing Uk himself, Mu-deok's wailing plea gets him released to Songrim.