User blog comment:Berserkchart486/Warring States Fanon Canon/@comment-26116209-20141225034003/@comment-25152698-20141226203706

It'd be very difficult for anyone to learn sage mode around this time to be completely honest with you. People are constantly fighting to survive, whatever combatical skills they possess were gained through actual battles, not scrimmages. So there's no time really to even train, and sage mode isn't exactly something easy to learn.