Darkness Tower!

"A Tower?" Liu Kang thought and immediately approached.

"There's something strange about this tower, husband!" Fei Lan said while looking at the tower that seemed to be emitting black steam all the time.

Liu Kang felt the same way and immediately asked the system. "Heaven, is there something of value in there? And what is that steam?"

[The system can't detect what that thing is because it hasn't been seen yet. However, the system can judge whether the objects inside are valuable or not]

[And about the black vapor, it is the Qi of Extreme darkness which aims to make this Island float. That being said, this building is the main source of energy that allows the other islands to fly]

"Ah," Liu Kang raised the corners of his lips and became increasingly interested in what the system said.

"Husband, this building looks very dangerous. Shall we go inside?" Fei Lan asked while looking at Liu Kang.