Two questions. One, is Feur a Shire because her mom was a Yehkshir? And two, there were other eggs in the clutch, but only Feur’s was purple. Does that mean only Feur’s egg was convexity, and if so, what would the other eggs have been since you said that Olfur’Yehkshir pass on their own element to their young, not the sire’s element?

OOC : Feur is a shire by random, Yehkshir produce many breeds in a clutch (again, think of it more like a mythos thing rather than like scientifically). 

Feur’s egg WAS convexity, but her egg was given special purpose. The others in her clutch would have hatched with different variations of the element. Kind of like how with the Earth element, some dragons specialize with rocks while others wood or vines, etc. At least, that’s just how I personally think of the elements. There’s the key ones, Water, Wind, Earth, etc, but many subcategories. Olfur offspring typically are that element, with all those subcategories included in the clutch.  

Feuriah was meant to be that special snowflake that would have pure Convexity, while all her siblings would have aura/energy based abilities.