How can there be too much mytharc?? It's so obvious you and I are different viewers because I would love a shorter season (8-10 episodes) of nothing but mytharc.

How do they fix it? They can't. Amara ate Donatello's soul, so it can't be retrieved.

Hey, remember when Amara told Dean that the souls she's eaten are still alive inside her? And remember the good terms they parted on? How about some prayer action, huh????