Preparations I

After settling the Little Garden, the First Order Burning Furnace was clearly no longer enough.

The Steel Man production rate had grown slower and slower, reaching one every five days.

Lin Xin considered replacing it with a higher-grade Burning Furnace when he returned later.

As the energy source supporting the operation of the entire War City, the Burning Furnace was tied to the growth and production of every building. Azure Origin Art cultivation could only provide supplementary energy for a short period.

More than two months passed without him noticing. The Bewildering Gate had gone silent, and Lin Xin could not be bothered to respond.

After cultivating in seclusion for a time, he found that his cultivation had barely changed. He then realized that it was not a matter of insufficient accumulation, but of insight into his realm.

Breaking through from the Third Grade Void to the Fourth Grade Spirit was the final hurdle of the Fifth Order Human Immortal. Once he crossed it, he would enter the accumulation stage and could charge toward Grand Completion without much difficulty.

Yet what puzzled him was that neither the descriptions of spirit in the Azure Origin Art nor the corresponding records and cultivation techniques mentioned anything specific.

If entering and controlling the Apex Realm was the key core of Tier Five,

then the key to the Fourth Grade should also lie in the Apex Realm.

With no results despite all his efforts, Lin Xin sent his foolish elder sister, Lin Yaoyang, away first.

Feng Huai happened to be sending someone back, as it was time for him to return to his sect. Lin Yaoyang could leave with them.

Compared to the sect rule that only allowed one return per year, Feng Huai's backing was clearly much deeper.

Lin Xin thus asked him