Some questions that came to mind when I was rereading

Book 1

It's said that no one has seen a fireblossom burning in over 100 years
It's also said that the Wundersmith (Ezra) hadn't been seen in over 100 years
Questions:

- Did Ezra extinguish them?

- Did they somehow go out when he was exiled (with or whithout his knowledge) but no one knew why?

- Is that why Mog was able to reignite them - because she's a Wundersmith?

Book 2 causes no questions :|

Book 3

At some point it's said 'It's unclear whether Crow is descended from the late Ezra Squall'
Question: Do they think he's dead?

Other questions:

- Can you change your Nocturne song (for calling Wunder) because I really can't imagine 8yo Ezra calling it with the sinister Little crowling (or maybe he just liked sinister idk)

- What's Ezra's anchor object for the Gossamer Line?

Feel free to theorise about these in the comments or ask your own :)