Obviously Elena was given the perfect score for the third trial. As for rewards, she was given a piece of beautiful clothing that was also enchanted with various special formations that allowed one to resist most types of elemental attacks. It was really a very beautiful cloth and could even be considered to be most beautiful outside the divine and higher realms.
Other than that she was also given a special item called "Elemental Heart". This was a divine item for any cultivator as it allowed one to become one with a particular element and that in turn increased that person's resistance and control over that element.
