InuYasha (2000)

S1E6 Tetsusaiga, the Phantom Sword

The muonna compels Inuyasha to disclose where his father’s grave is hidden. In a brutal act, Sesshomaru takes Inuyasha’s right eye, the black pearl, and accesses the grave. Kagome, infuriated by Sesshomaru’s ruthlessness, decides to follow Inuyasha as he pursues his brother. Once inside their father’s tomb, they discover a cherished relic belonging to Inuyasha's father—the legendary sword Tetsusaiga.