I think before it split into two dragons, it obviously didn’t have any ice — that only leaked out when it had missing pieces!
It generates a powerful, freezing energy inside itself, but its body became frozen when the energy leaked out.”
I’m pretty sure it just retained a lot of the core elements from each, but if it had *everything* it would be too cluttered
and the yellow? yellow’s been used to represent both lightning and fire… so it’s really convenient it works for both of them