The sign-in opportunity surprised Lin Jiufeng.
But he looked forward to what he would receive.
After all, this was the door to the Mountain Sea Realm—the door to a hidden world.
It has been so long since the door to this hidden world was opened.
Hence, Lin Jiufeng judged that he would receive a unique and rare reward upon signing in.
Lin Jiufeng had long figured out the reward patterns for signing in.
The more dangerous a place was, the greater the reward would be for signing in.
The more unique a place was, the more precious the reward would be.
As for some places that could be repeatedly signed in, only the first time was the best. The repeated sign-ins yielded worse rewards than the first.
This should be the first time in 15,000 years that the door to the Mountain Sea Realm was opened.