21. 22. Naraku’s real body is approaching and platycodon’s soul (Naraku’s body is approaching and platycodon’s soul)
The four spirits that Kagome dropped into the bone-eating well through Shippo The fragments returned to the Warring States Period. After solving Lang Yegan, Inuyasha met Naraku and learned that Naraku was the form of the ghost spider after absorbing many monsters. Naraku even told the truth about why Kikyo and Inuyasha killed each other 50 years ago. And showed his true face.
At the same time, Kikyo keeps collecting the souls of dead women everywhere in order to keep the body made of clay moving. Inuyasha overheard the news about Kikyo and chased him alone. Kagome, Maitreya and Qibao also followed the dead soul insect. In the forest with the barrier open, Kagome saw Kikyo...
Episodes 21 and 22 are connected together. You said it was the end of episode 22, and the music might be "The Miserable Miko"