"It's been half an hour. Why aren't Zhou Sining and the others back yet? Could they have run into danger?"
Jiang Shaoxu glanced at the Screen on her wrist, growing worried.
Ever since Zhou Sining had gone after Lu Yilin, the four of them had barely moved.
Fortunately, the coral reefs here were tall and massive. As long as they kept their backs to them, they didn't have to worry about their safety.
During that time, they had encountered quite a few passing teams and demon beasts, but they had made it through every scare unscathed and even obtained seven Demon Cores.
Including the eleven Giant Strength Sea Monsters they had killed at the beginning, they had collected eighteen Sea Urchins in total in the roughly one hour since entering the sea.
They still needed twelve more Sea Urchins to meet their quota.
Taking everything into account, they could stay for another half hour at most.
After that, they had to return to shore, no matter what.
Whether they met their quota was a minor concern. What mattered most was that Zhou Sining and Lu Yilin still hadn't returned!
"Still no word from them?" Mu Nujiao asked.
"No." Zhao Manyan shook his head.
The equipment they wore allowed them to communicate through their headsets and detect their teammates' locations within a radius of three hundred meters.
Beyond three hundred meters, however, both the communications and tracking systems stopped working.
"Wait, we've got something! Looks like a dot is heading toward us!" Jiang Yu suddenly spoke up. "Look at your Screens."
At that, all four raised their left wrists and made a few quick adjustments. The Screens, which had displayed distance, oxygen levels, equipment status, and time, changed into green maps.
The maps showed four red dots clustered together. Apart from