If you have to write threads worth of fanfiction explaining the thing that the game never built up to or explained then it didn't give a reason why.
There is no fanfiction in the
game we played taking two narrative elements (draconification and recall) and
combining them.
Evidence--
Memory 4:
Rauru: But if you, like Sonia, have a secret stone and are able to manipulate time, then your story makes sense
Sonia: I can feel your light power within her. As well as my time power."
Memory 5:
Mineru: I suspect it was the power of your secret stone that allowed you to travel through time. To put it simply, secret stones amplify the power their owners possess...Rauru can repel or destroy evil with his power of light. And Sonia, she can control time. As for you, I can sense both light and time powers. But your secret stone seems to amplify your time power. Ultimately, the secret stone only amplifies your power. It doesn't suddenly grant you mastery and control. That's still up to you...
There are stories about the secret stones and a forbidden act called draconification. 'To swallow a secret stone is to become an immortal dragon, one blessed with eternal life.'
Rauru: Interesting. Another way to reach the future, though not a very quick one. So you think these stories could hint at a solution to our dilemma?
Mineru: Yes. But there is still more to those tales.
'To become an immortal dragon is to lose oneself.' That is why it is forbidden. I thought maybe this could lead to a solution--some way to transcend time. But if you have to sacrifice your heart and mind, sacrifice what makes you "you." I'm sorry. I wish I could help more.
Rauru: I think the answer, the answer to this problem lies in study and learning more about the nature of your power.
Memory 8:
Sonia: The secret is to think of it like drawing out the object's memory. You ask the object where it was, how it arrived where it is now, and then you coax it back to that original moment in time.
Zelda: The object's memory...
Sonia: I am sure it will become almost like second nature, and you will be able to find your way home...You possess more than the power over time. You have a sacred power that can dispel evil. Both of these powers will help you protect your own era.
Memory 15:
Rauru (flashback): Zelda, I believe there is a reason you were sent to us. It has to mean something.
Zelda: I know why I am here. It's something only I can do. We will finally stop him.
Mineru (flashback): 'To become an immortal dragon is to lose onself."
Zelda: I'll be forever changed. Link! You must find me.
Memory 16:
Mineru: I've told you! That act is forbidden for a very good reason! It would mean throwing yourself away! You...won't be able to change back.
Link: The moment I had the sword, I knew what to do. I knew this was why I came to this era.
Mineru: I understand. You really have made up your mind? Very well, then. As a Zonai, I bear my share of blame for these events
The story depends on the emphasis mineru placed on draconification. you're writing more fanfiction but this time your fanfiction retroactively worsens the source material for its existing
She only says "you won't be able to change back" ONCE, and it's as a last-ditch attempt to stop Zelda from doing it.
We
see Recall activate on Link's hand, we
know that it can coax an object back through time via its memory, we
watch Sonia and Rauru's spirits add additional time and light power to this endeavor, and then Zelda wakes up with no memory of her time as a dragon; what felt like "sleeping" she says, and a "warm loving embrace" waking her up. This is the subjective experience of a draconfied being, with all sense of what makes her "her" gone, Zelda, being sent back in time.
This is not fanfiction, this is evident in-game and confirmed in subsequent material, this is not absurd, this is not bad storytelling, and this is not narratively unsatisfying or confusing. Zelda draconified and then was recalled.
The fanfiction element is the
specifics of the relation of Link, Zelda, Rauru, Sonia, and Mineru to the process that occurs.
What part does Link play? He has Recall.
What part does Zelda play? She is getting Recalled.
What part does Rauru and Sonia play? Not sure. Perhaps they don't even need to be there.
What part does Mineru play? She probably is the one that allows their spirits to continue to exist.
This is canon stuff: the constant repitition of "this makes no sense" or "this is fanfiction" has gotta stop.