C653 Return to the Square Alchemy Tower

It was really gray. The center of the island seemed to be covered by a huge gray balloon. However, Yuen Zhang couldn't even see the end of his Immortal Sense.

"Here, and here. Once this black dot is penetrated, we will be able to enter." Bai Fenglan pointed at the black fog in front of Yuen Zhang and said.

The gray fog should be a natural formation. With just a slap, Yuen Zhang was sent flying