"Be careful!"
Xu Xin said anxiously.
Xu Nian nodded and then walked towards the giant door.
The Spirit Talisman Key was the key to unlocking this door and also the voucher to enter the main hall.
Only the person holding the key could enter this great hall.
Thus, as Emperor Bai's phantom had said, only one person could enter this final main hall.
Xu Nian walked towards the giant door.
He spread out his hand, and the Spirit Talisman Key floated above his palm.
Xu Nian slowly moved the Spirit Talisman Key closer to the giant door.
"Buzz!"
The moment the Spirit Talisman Key touched the door, it emitted a strong beam of light.
The light shone on the door, instantly producing a humming sound.
Then, in front of everyone's eyes, the giant door slowly began to open.
However, the crowd could see nothing.
There was a sacred light shield on the door, blocking all lines of sight.
It was impossible to see clearly what was inside.
