Yōreitaisei

Yorei- Taisei known as the great holy demon spirit's is a demon hermit.With Tetsusaiga's new power, Toto-sai sends InuYasha to him to train so he can use it without it backfiring. When InuYasha reaches the village, as Inuyasha undergoes a test by his designed to help InuYasha discover the existence of whirlpools of demonic energy that InuYasha can cut to defeat his enemies.