Why does he want the Tessaiga so bad if he already has the Tenseiga, a sword that was also made from his fathers fangs?
To put it in simplest terms, Sesshoumaru did not want a sword that saves or restores life. That is not something he values or seems to value. In fact, he had even made a comment about it being a useless sword that is not capable of killing. When Sesshoumaru was first introduced, we hear it from his own lips that he craves more power even though he already has so much. He wanted the legendary sword, Tessaiga, to attain his father’s spiritual power and become even more powerful himself. Perhaps this is also a reflection of his desire to be more like his father. Throughout the series, we don’t exactly see Sesshoumaru as someone who’s rushing to save any lives as he’s more the type that couldn’t care less about whether you’re dead or alive. And if someone gets in his way, he wouldn’t hesitate to harm them. So it’s very ironic when he is instead bestowed upon,the sword of life rather than the sword of destruction. Naturally, it only makes it worse that it is his despised brother that inheri