This protective barrier had been condensed from the vital energy of a peak Primal Spirit Realm expert.
This peak Primal Spirit Realm expert was the Shen Family's Great Elder. His strength was no trifling matter, yet even he could only barely hold on for such a short time.
Moreover, after the protective barrier formed, wave after wave of Shen Xin's attacks slammed into it.
However, the instant Shen Xin's attacks landed on the barrier, it began to sway unsteadily.
Seeing this, terror appeared on Shen Xiu's face. He knew that if he held on a moment longer, even his peak Primal Spirit Realm vital energy would be completely exhausted.
But he had no other choice. He could only grit his teeth and endure, because once a Primal Spirit Realm expert's vital energy was depleted, death would be the only road left.
"Whoosh, whoosh!"
At this moment, the attacks grew increasingly ferocious. Several waves had even already grazed the body of the peak Primal Spirit Realm expert.
Seeing those attacks, Shen Xiu did not dare slacken. He immediately circulated the vital energy within his body, forming one high-level Primal Spirit Realm martial skill after another.
The martial skills flowed from his hands as smoothly as drifting clouds and flowing water, every move carrying astonishing might.
Yet he also knew that he could not withstand those attacks for long. In the end, he would still be overwhelmed by them.
"No, I have to get the key as soon as possible." Shen Xiu stared ahead and said through gritted teeth.
He understood as well that if he delayed any longer, he truly would not leave this place alive.
"Whoosh."
At once, Shen Xiu's body became a streak of light as he darted toward the distant Iron Gate.
However, the Iron Gate seemed to