Satsujinsha

Satsujinsha is the scythe that is used by Shikyo. This scythe doesn't do any physical damage, it does spiritual damage as if slices the soul of the opponent which will result in their death. When the scythe is used against an opponent, it is intangible to their physical body, instead in seems like it phased inside the body because it targets the soul rather than the body itself. Once it slices into the soul, the target is dead.