Yōreitaisei

Yoreitaisei known as the great holy demon spirit is a demon hermit. With Tessaiga's new power, Tōtōsai sends Inuyasha to him to train so he can use it without it backfiring. When Inuyasha reaches the village, he undergoes a test to help Inuyasha discover the existence of whirlpools of demonic energy that he can cut to defeat his enemies.