Board Thread:Naruto Discussions/@comment-5054236-20150717003436/@comment-26675690-20150717222026

YYR? SPS is 6 path senjutsu right? I don't think you need two casters to use RCT. I believe Hagoromo and Hamura created their own seals and used them to beat Kaguya and taught/gave the other the opposite seal (Hamura because he was guarding the moon and Hagoromo in case Kaguya =< threat showed up). The reason why Hago gave both Naruto AND Sasuke a seal (aside from ignoring logic) was because he wanted to trust both his sons with his legacy this time (aka Kishi logic)