ATLA STORY . SEDNA A GIRL CREATED BY THE BIG THREE GODS . ZEUS , POSEIDON. THEY WANTED TO EXPERIMENT WITH MAKING A CHILD WITH AS MUCH POWER ASTHEY COULD BUT ONCE SEDNA TURNED 11 THEY DROPPED HER IN A RANDOM DEMINSION WITH A MISSION . HELP SAVE THE WORLD NO MATTER THE STAKES NO MATTER WHAT SHE HAS TO DO .