InuYasha: Kuroi Tessaiga

Sesshoumaru has never accepted that their father left Tessaiga to his half-demon brother Inuyasha. Learning that even the destructive technique he mastered with Tenseiga was meant to pass into Tessaiga only deepens the wound.

Naraku exploits that resentment and offers Sesshoumaru a way to seize Tessaiga's power. The brothers clash in a battle that tests inheritance, pride, and whether Sesshoumaru can finally recognize the strength Inuyasha has made his own.