Board Thread:Versus Debates/@comment-26993711-20160324045212/@comment-25093611-20160406083957

Sayian101 wrote: Yeah, if it's jutsu related or coated by chakra. both of which totsuka is not. i think the blade requires chakra to activate (susanoo) but the sword itself is not. similar to orochimaru's living corpse reincarnation jutsu and six path sealing pot. both of which is similar to totsuka since all 3 involves shifting souls to it's new location. i dont think susanoo is required :I, otherwise orochimaru would have no use in this blade :)

mostlikely it is a normal artifact which is like the examples you mentioned but itachi somehow fused it with his susanoo, the same with the mirror ^_^