Dungeon where aliens are imprisoned

When they reached the Nine-Directions Purgatory Tower, the servant stopped and glanced at the group of powerful alien warriors behind him, who were looking at him with fear on their faces and murderous intent in their pupils. He whispered, "Sir, I have brought you to the main body of the Nine-Directions Purgatory Tower. You have to walk the rest of the way by yourself!"
Just now, as they walked along, many powerful alien races at the peak of the supernatural power realm followed behind with strange...