Board Thread:Theories and Speculation/@comment-34656247-20190807151750/@comment-32685487-20190807200547

It was only those two and it was before Hagoromo became a TTJ, and from what we were shown before Hamura acquired the Tenseigan. With only 2 of them they lasted that long and finally beat Kaguya themselves with the yin and yang seals to use SP: CT, while it took 5 people to do it before WITH Hagoromo's help as they needed the SP: CT to do it and Hag was the one who gave them the yin and yang seals for it.