Especially when they saw those Dragon-blooded Human Servants and Dragon-kin Harpies. This undeniably indicated that this towering castle was indeed a Giant Dragon's castle.
Even the four young dragons began to suspect... if their father might be a Black Dragon?
Among Evil Dragons, while most of the time they lay eggs with their own kind, for example, Black Dragon with Black Dragon, Green Dragon with Green Dragon.
But in some rare cases, a Red Dragon might find a Green Dragon, and a Blue Dragon might find a Black Dragon...
So, it wasn't impossible for their mother to be a Green Dragon and their father a Black Dragon.
As for why they didn't have the traits of a Black Dragon?
That's also normal. After all, the Dragon Blood of a Black Dragon isn't as strong as that of a Green Dragon.
Moreover, in the Giant Dragon Race, when two Giant Dragons mate, the resulting bloodline often depends on the mother dragon.
