World of Death (金剛夜叉•烏芻渋摩混合流屍界, Kongō-Yasha•Ususama Kongō-ryū Shikai) is a technique created by Ata combining the two styles that he mastered: Ususama Style and Kongo-Yasha Style. This technique sends the target to another space where the H-particles are non-existent, causing body degeneration.