The Backlash Wave, Tetsusaiga's ultimate technique

Kagome recpas what happened in the previous epi. Inu has gone to kill Ryukotsei, the dragon youkai that killed his father. During the battle he had dropped the Tetsusaiga & transformed. Meanwhile everyone's concerned because Inu's away from his sword. (Kag & the gang along with Toutou-sai are watching the battle scene). The dragon has discovereed Inu's tranformed. They battle. Toutou-sai gets everyone to retreat but Kag wants to stay. Miroku then notices Inu acting strange. He''s going for his sword. The dragon goes after Inu again. Everyone's worried Inu's dead. Inu used the Tetsusaiga's sheath to stop the dragon's blast. (Unfortunately he can't do that again as the sheath will be destroyed). Then Miroku tries to suck in another one of the dragon's blasts but can't & winds up diverting it instead. Inu grabs his sword & changes back. He's ticked off & resumes the fight. The sword is still too heavy so he & the dragon trade insults. Then the Tetsusaiga gets lighter so he stabs the dragon's heart. The it gets really light. They keep battling. The dragon's body is too ahrd to cut into pieces which Inu needs to do in order to defeat him. Inu then notices the wind scar is swirling around Testusaiga's blade. So he calls upon the wind scar (he can now summon it any time he wants). He thinks he's now killed the dragon, but hasn't. Then the dragon blasts him again & he cuts through the blast with the wind scar. He winds up using a new technique the backlash wave. It takes the wind scar & uses an enemies demon aura against the enemy to destroy him. The dragon is killed, Inu has surpassed his father in power & is really happy. He starts showing off & everyone is like watch it! So Kag "sits" him. It ends with Toutou-sai going away thinking Inu is still a ruffian.