Aria Kelly was the leader of the Black Lake Sect's followers. They were lucky enough to be teleported to a region where the creatures were weak.
They built a base within that region while exploring their surroundings. They found many kinds of fruits and other sources of food.
Moreover, the area was slightly elevated as compared to normal plains.
After a couple of days, Duncan, one of Aria's trusted subordinates, secretly met with the Silver River Sect's leader.
A long-standing partnership existed between the Black Lake Sect and the Silver River Sect.
Duncan wanted to win Christina's heart. For that, he knew he had to do something big in this Heavenly Dragon Battleground's Tournament.
Either that or achieve something for the Black Lake Sect.
However, he knew that even if he did achieve something, Aria would receive the credit as she was the Black Lake Sect's Group Leader.