Board Thread:Speculation House/@comment-14138255-20151213162620/@comment-26397825-20151220001236

What if they transfer Amber's soul to Pyrrha and the process succeeds, but the Fall power leaves anyway because it recognises that Amber is technically dead by removing her soul from her body. So Cinder gets the complete power and Pyrrha has to deal with having two souls, and if they try to take Amber's out it tangles with Pyrrha's so she's stuck with it.

Just a thought.