13 Years Ago, 'The Legend of Korra' Finally Answered the Biggest Avatar Mystery

Then, at a dire point midway through Legend of Korra season 2 when the South Pole spirit portal was opened, plunging the water tribes into civil war, Korra is swallowed by a massive dark spirit while at sea. She loses her memory. So much of each Avatar’s journey has been about reconnecting with their past selves, using their memories, shared knowledge, and skills accumulated over thousands of years. But perhaps for the first time ever, Korra is the only one who must go all the way back to the very beginning.