Fairy Ziwei's analysis was not wrong.
Because of Fate Gu, ancient Gu Immortals could not travel to the future, and future Gu Immortals would not be able to come to the present.
But with the damage to Fate Gu, the restrictions along the Time Path had loosened considerably. The Spring Autumn Cicada was the best example — although it could not send a Gu Immortal fully back to the past, it could transmit a strand of will backward.
Future Body, Predecessors, and Successors — these killer moves operated on the same principle, borrowing the state of some figure from the past or future and projecting it into the present.
Once Fate Gu was fully repaired, these killer moves would cease to function.
Fairy Ziwei understood the reason, and Bing Saichuan had long known it as well.
But there was nothing he could do.
He could not destroy the Refinement Grand Formation, for if he did, the Heavenly Court's efforts to repair Fate Gu this time would be completely undone.
A severely damaged Fate Gu would be useless even if the Eternal Heaven side obtained it — they would have to follow the Heavenly Court's example and continue repairing it.
But Bing Saichuan knew full well that Eternal Heaven did not possess the Heavenly Court's vast resources, lacked its Humanity Path methods, and had no Undefeated Legacy. They were fundamentally incapable of repairing Fate Gu!
Since he could not destroy the Refinement Grand Formation, the Eternal Heaven side could only break through it, enter the Heaven Surveillance Tower, and forcibly seize Fate Gu.
Regarding this, Bing Saichuan had already dispatched the Five Elements Grandmaster and Bull Demon ahead of time.
But this was his limit.
It was not that he did not want to send more troops — from the visions within the River of Time, Northern Plains powerhouses continued to emerge one after another.
Rather, the Refinement Grand Formation itself had a limit.
This grand formation's purpose was to repair Fate Gu, not to conduct battle. The formation space it generated could accommodate at most five Eighth Transformation Gu Immortals.
Any more than that, and the Refinement Grand Formation would burst.
Therefore, Bing Saichuan could not dispatch anyone else to reinforce them, and the Central Continent side could only sit by and watch.
The great battle raging around the Calamity Fate Altar involved countless historical powerhouses and was exceedingly brutal. But the more critical fight was the battle within the Refinement Grand Formation!
Bing Saichuan gritted his teeth, silently contemplating the overall situation: "Though my side is strong, we must focus on defense. However, overall, we still hold the upper hand. If it comes to it, we'll have to destroy this Refinement Grand Formation — even if we can't take Fate Gu, we must ensure the Heavenly Court's repair efforts fail completely!"
Neither side wished to destroy the Refinement Grand Formation, but if pushed to the brink, Eternal Heaven would still destroy it, even if both sides suffered.
Of course, Bing Saichuan's primary objective in leading Eternal Heaven's surprise attack on the Heavenly Court was to seize Fate Gu. If they destroyed the formation, they would undoubtedly have failed as well.
"Now it's our turn!" Bull Demon had been keenly aware of the battle outside all along.
In the distance, the Five Elements Grandmaster nodded slightly, his expression grave.
Suddenly, the Five Elements Grandmaster's body trembled as a torrential aura erupted outward. He unleashed a powerful Immortal Killer Move that trailed five-colored radiance, shrouding his opponent Che Wei.
Che Wei bellowed, clapping both palms together before his chest and activating his own killer move.
Instantly, countless massive square shields materialized before him. With a rapid series of clicks, these shields assembled into a wall that blocked the five-colored radiance.
"Damn it!" The Five Elements Grandmaster intensified his attack, and under the erosion of the five-colored radiance, the shields shattered one after another.
But Che Wei's defense was airtight — old shields broke but new ones had already formed, rapidly plugging every gap.
Che Wei's defensive methods were exceptionally formidable, leaving the Five Elements Grandmaster feeling wave after wave of powerlessness.
Within the Refinement Grand Formation, both Che Wei and the Five Elements Grandmaster had to restrain their force, fearing that a moment's inattention could damage the formation.
On the other side, the battle between Bull Demon and Cong Yan was much the same.
Undoubtedly, this was highly advantageous for the defenders.
"What do we do?" The Five Elements Grandmaster sent a voice transmission to Bull Demon.
Bull Demon answered with just one sentence: "Attack! Draw their attention with everything you have!"
With that, Bull Demon lunged at Cong Yan once more, and the two became entangled in fierce combat.
The Five Elements Grandmaster's heart skipped a beat — Bull Demon's words carried hidden meaning. Without overthinking it, and trusting in Eternal Heaven, he continued fighting Che Wei with full force.
Meanwhile, Yuan Qiongdu remained entirely focused on operating the Refinement Grand Formation, pouring everything into repairing Fate Gu.
Without anyone noticing, a delicate flower drifted as if carried by the wind, slowly floating down to the base of the Heaven Surveillance Tower.
"Hee hee hee." The flower fell into the Heaven Surveillance Tower and suddenly transformed into a young girl.
It was none other than the previously fallen female Immortal — Hua Zi!
"Trouble! Someone has entered the tower!" Upon realizing this, Yuan Qiongdu turned pale with shock and immediately shouted a warning. This single cry cost him dearly — blood erupted from his seven orifices, his mind suffered a devastating blow and split clean in two, unable to merge back together.
Che Wei and Cong Yan hastily retreated, trying to rush back to the Heaven Surveillance Tower to stop Hua Zi from reaching Fate Gu.
"Too late!" Bull Demon laughed heartily as he and the Five Elements Grandmaster both exerted their full power, pinning the two defenders firmly in place.
Che Wei and Cong Yan grew more desperate with every exchange, cursing Bull Demon for his shameless and insidious ambush.
This was the great secret shared between Bull Demon and Hua Zi — their lifespans were linked. Even if one died, as long as the other survived, they could revive within a period of time.
By the time Hua Zi revived, she had already flown into the Heaven Surveillance Tower. The Refinement Grand Formation still contained only five Gu Immortals and had not burst — it was still operating smoothly.
"What do I do?!" Yuan Qiongdu's vision blurred with darkness, his head splitting with agony as he faced the most difficult choice of his life.
He controlled the Refinement Grand Formation and could at this very moment tamper with Fate Gu, rendering all of the Heavenly Court's repair efforts worthless.