Episode 6

Tetsusaiga, the Phantom Sword is the sixth episode of the InuYasha anime.

Plot
Kagome is still paralyzed from a certain spell. Inuyasha's "Mother" (who is actually just an illusion of his mother) has hugged him and tries to absorb him into her body. Jaken comes out of nowhere and tells her not to do so until they find out where his father's tomb is. Jaken tells her to ask Inuyasha where his father's grave is. Inuyasha is pushed into the "water" (something that it is merely an illusion) and he says that he sees a black pearl to the right. Jaken doesn't know what he's talking about, and says to look deeper. The unmother then says if she goes any deeper than Inuyasha's soul will be shattered, but Jaken says he doesn't care as long as they have the information they need.

Kagome is woken up by Myoga who sucks her blood and she realizes that she's less paralyzed then she initially thought. Myoga tells her that the woman is the Unmother who feeds on the souls of lost children. Myoga shows Kagome the reflection in the water and they see the unmother holding Inuyasha when he was a kid. Kagome finds Jaken and strikes him sending him flying into the water and then takes the staff of two heads before she chases after the Unmother, and splashes the reflection which causes the Unmother to release Inuyasha. Sesshomaru appears and tells them that he knows where the tomb is located.

As Inuyasha attacks Sesshomaru, Sesshomaru grabs his neck and stabs two fingers into Inuyasha's right eye, drawing out a small black pearl. Inuyasha attacks Sesshomaru again, but he dodges and attacks Inuyasha. Just when he is about to strike him, the Unmother blocks Sesshomaru and takes the fatal blow instead. Myoga says that even though she has no children, she has the heart of a mother and wanted to protect Inuyasha. Sesshomaru tells Jaken to come to him and Jaken gives him the Staff of Two heads. He places the bottom of it onto the pearl, and the face of the old man on the staf laughs and opens a portal to the netherworld. Sesshomaru and Jaken enter the portal with Inuyasha, Kagome, and Myoga quickly following behind.

They enter into the netherworld, which turns out to be demon lord's grave. Skeletal vultures circling the humongous skeleton in armor which happens to Inuyasha's father. Inside the skeleton Sesshomaru and Jaken have found what they've been looking for; the Tessaiga, a sword that was made from the fang of Inuyasha and Sesshomaru's father's own mouth. When Sesshomaru grabs the hilt of the sword, he isn't able to pull it out, and realizes that his father but up a barrier. Inuyasha and Kagome and Myoga find him and Myoga tells him to get the sword, revealing it was always intended that Inuyasha inherit the sword after his father passed, which should be proof enough for him to be able to get it out. Inuyasha doesn't think he should bother taking the sword taking in its rusty appearance remarking that it couldn't even cut wet paper. But Myoga insists he pull it out, but Inuyasha cockily says his brother can keep "the rusty piece of junk," and attempts to battle his brother again, but fails and Myoga says he cannot fight unarmed and must get the sword. This time Kagome encourages him to "get the dumb sword," and if he can't hit Sesshomaru's body then to hurt his ego, convincing Inuyasha to pull out the sword. But when Inuyasha does try, he sees that he isn't able to get it out either despite his best strength.

Sesshomaru becomes finished with his patience and attacks Inuyasha while Kagome fights Jaken having gotten annoyed with him. After getting distracted, Sesshomaru gets a hold of Inuyasha and is prepared to strike him. Jaken overwhelms Kagome when he knocks his staff into her gut and the she places her hand on the sword's handle to steady herself. Sesshomaru intrudes his poison claws to Inuyasha and just when he is about to kill him, Kagome notices and calls out Inuyasha's name and in the midst of her emotions, yanks out the sword shocking everyone including herself. The episode ends with Kagome thinking, "Now what?"

Trivia

 * The portal that Sesshomaru, Jaken, Inuyasha, Kagome, and Myoga went through to get to Great Dog Demon's grave has the same graphics of Kagome and Inuyasha traveling through time.