Senior Sister has mastered the alchemy path and is now in her youth. She is already a illustrious Alchemy Emperor! The second senior sister is good at refining weapons and can turn them into heaven-level mysterious weapons with just a wave of her hand!
The third senior sister has mastered the formation and is able to kill millions of aliens with her own strength! The Fourth Senior Sister is in harmony with the beasts. Even when the divine beast comes, it will prostrate and bow its head.
...I have seven such senior sisters! And I am their most beloved junior brother.