Formations could maintain themselves autonomously until their stored energy ran out, but they ultimately still required cultivators to control them in order to bring out their full might.
Simply put, Wushuang Island's Protective Grand Array had stored some energy. As it defended against the invading enemies' attacks, that energy was constantly being consumed. Once it was exhausted, the Protective Grand Array would no longer be able to hold.
There was only one way to last longer: manually control the Grand Array, inject cultivators' Spiritual Power into the formation core, or find a way to activate Lingyu's power and replenish the Grand Array.
But no matter what they did, they needed manpower!
And Wushuang Island's greatest problem right now was its lack of manpower!
That was why Chu Shen had never intended to simply defend. In the current situation, defense alone would accomplish nothing. They had to counterattack as well; only then would they have a sliver of hope.
A qualified Grand Array needed more than defensive capabilities. It also needed the power to strike back!
Of the four million Lingyu Chu Shen had spent, half had gone toward arranging the Grand Array's defenses, while the other half had been used to deploy several offensive Spiritual Treasures.
Every one of those Spiritual Treasures was a weapon capable of storming cities and uprooting strongholds. They were fundamentally different from the Spiritual Treasures cultivators normally used. Such treasures were expensive and difficult to wield; even a Star Constellation Realm Late Stage cultivator could hardly activate one alone. In the starry sky, such things were often equipped on starships.
Yet now, with the aid of the Formation Plate, the many Star Constellation Realm Early Stage cultivators on Wushuang Island had linked their auras together and could freely borrow strength from one another. The power