Whether through Ninjutsu, Taijutsu, Genjutsu, or even specific Ninjutsu skills, one could attain strength powerful enough to rival Kage level.
However, this process required prolonged accumulation and profound comprehension. The experiences of predecessors could significantly lower these hurdles, but even so, during the Warring States period, very few people managed to successfully achieve this.
Now, because Uchiha Madara had taken away the clan's foundational heritage, leaving no reference examples behind, the task had become exceptionally difficult. Consequently, only the mother and son were currently capable of it, and Uchiha Mikoto had just taken her very first steps.
Chapter 137