Naraku

Naraku (奈落, "Hell, Devil") was a spider hanyō born from the human Onigumo and various other demonic yōkai. He was directly responsible for the death of Kikyō and the seal placed on Inuyasha. Naraku desired the Shikon no Tama, a jewel that would be able to grant him near-invincibility should he acquire all the pieces of it. He desired the jewel to purge his half-human self from his body, enhancing his strength even further.