Bakuryūha

The is the ōgi, or ultimate secret technique, or finishing move of the Tessaiga. The technique builds up from the the Kaze no Kizu, the base technique of the Tessaiga, and can only be used by someone who has already mastered that move. When an opponent with strong yōki unleashes an attack, the Tessaiga can use the Kaze no Kizu to engulf the enemy's attack in a twister and reverse its flow back on them, with the added power of the Kaze no Kizu.

Inuyasha instinctively learned and mastered the technique while in the midst of his battle with Ryūkotsusei. The user's yōki must be greater than the opponent's own yōki or else the technique cannot be used, as explained by Tōtōsai after Inuyasha discovered it and as seen during one battle against Sesshōmaru, during which Sesshōmaru was able to reverse the flow of the Bakuryūha using only his aura. In the aftermath of Naraku's transformation at Mount Hakurei, Naraku was able to engulf either the Bakuryūha or the Kaze no Kizu in his own yōki, turning the Inuyasha's attacks back at him.

爆流破 Bakuryuha