This picture shows that it seems the 3rd knew this jutsu.
But I don’t think the 3rd would let orochimaru invent a jutsu like it and know about it as well.
This picture shows the 1st and 2nd hokage knew the jutsu.
If they knew the jutsu it means orochimaru never created the jutsu because the time difference.
This means orochimaru never created it.
It seems someone else created Edo Tensei.
i wonder who 1st created Edo Tensei.
got any idea's people
any way I just thought I would mention this.