After rushing to the tunnel's depths, the four unicorns suddenly stopped. After they roared towards the end of the tunnel at the same time, wisps of green starlight flew out of their mouths. Then, the green light intertwined and formed a green key.
The key enlarged infinitely before finally turning into a boat.
After the unicorns brought the four of them onto the key ship, they realized that their vision had become pitch-black. Even Yu Huang, a Level 8 Purifying Spirit Master, couldn't see anything.
That was because the key ship had the ability to block light.
This key was flying towards the end of the tunnel at a quick speed. In the end, it flew into a floating green starlight dot. The dot was an independent space. Outside the dot, there was a huge black door refined from meteorite energy.
After the green key flew directly into the entrance of the huge black door, the sound of a mechanism opening sounded.
