I didn't forget, but it could be one of those instances where the baby has a different magic attribute. Maybe the Asha flower Zachary gave Elle had some sort of blessing to it.
Could also be something totally cheesy like Zachary got ice because he was born from cold and loveless parents. If I remember right his dad was infatuated with Zachary's mom but I don't think she really loved his dad. If we look at it from that stand point then the baby being born from a loving couple who are happy, then the attribute of his magic could reflect that, like an earth attribute that can make flowers and trees bloom. Might become something where he can help the land and people vs just getting sent off to war all the time like Zachary did.
I feel like I'm going further down a rabbit hole the more I write so I'm just going to stop here
Actually after thinking about it a little more, I think they refer to Zachary's magic as winter magic, I can't remember for sure because I read so many other stories so I could be getting it mixed up with another lol, but I think there's been others in the Duke's family who's had the winter magic, like sometimes it skips a generation or something, idk I could be wrong lol.But if that's the case maybe with the loving partnership with Elle and the possible blessing of the Asha flower, maybe it can be one of those breaking the generational curse types of situation and their kid, instead of having winter magic, can have spring magic. I feel it could be plausible.
Or I can be completely off the mark and should just go write a fanfic
Their magic stems from a ice dragon I thought, since the kingdoms story is how with the Asha branch the royals sent the dragon packing?
I think she has the power of the Asha tree, hence why she can make flowers bloom and even tell what flowers are feeling. And with how she can easily ‘tame’ Zachary seems the most plausible, and why the king wants her so bad.
I went back to the beginning to check something and he said to her when they first met that she smells like Asha flowers.
Also the price/ emperor try to use the Asha’s blessing on her and apparently it didn’t work and according the to princess only Zachary and his father would be immune as in it won’t work on his house.
This is complete a speculation/theory not a spoiler, but....
I wonder if Elle is pregnant. I have a feeling this might be one of those instances where she's getting magic through the fetus. There's plenty of stories out there that's gone in that direction, so it'll probably be one of those instances where the baby has magic like Zachary and it's seeping out during the pregnancy and Elle will go back to normal after the baby is born. The vision could be her future son
Again, not a spoiler, just something I can go back to and say called it if it turns out to be true