Entering the black tower again

Everyone watched as the students entered the black tower. A few of the audience also joined them. They were waiting for a resolution to the issue. They didn't know who else was in the black tower or even who they were.

"Why do you want the artefact?" The headmaster asked.

"I am sorry, but I am not in a position to tell you why we need it." The masked men replied.

"Then tell me who are you? What are your overall goals?" The headmaster asked.

"Our goals are a bit difficult to explain." The masked man replied. "And we are not going to tell you who we are. You wouldn't understand even if I did."

"If they were going to tell you that they wouldn't be wearing masks." Ao Tianzi muttered.

For a moment everyone turned to look at Bai Yun and Ao Tianzi. The two of them were flying in the air, taking healing pills and recovering.

"What are you two still doing here?" Elder Ran asked.

"Watching the whole thing and resting." Ao Tianzi replied.