A complete Major Energy Cycle, the second requirement to truly attain the Peak Stage was known as such!
Although it sounded fancy at first glance, it was merely a description of the Internal Energy required to manifest the abilities of the Peak Stage. All in all, the Major Energy Cycle was a major threshold even irrelevant to stage advancement.
60 years of Internal Energy, once a Martial Artist had managed to accumulate that amount of Internal Energy in their Dantian, they would be capable of using the preliminary form of Weapon Energy, usually known as Sword Qi, or Energy Sword. Becoming a Peak Martial Artist was still necessary to use the true thing, but just the fact that pure volume could exhibit such a characteristic showed how significant that threshold was!
