Inuyasha - The Complete Series
Part 6, Destroy Naraku with the Adamant Barrage!
S1 E157:
Naraku has stolen the final shard from Hosenki. Hosenki tells Inuyasha to kill him. Inuyasha's Tessaiga gains the demon powers of any powerful demon it cuts. Naraku begins to spew miasma from the cut that he received from Sesshomaru.