Other Magic Creatures are the same; those of the same species but different kinds can have offspring, and the offspring's traits are influenced by both parents,
The inheritance is contained within the bloodline—this is an obvious iron rule for almost all life forms.
But not for Goblins.
They are extraordinarily stable, seemingly will never change their existence form, always remaining at the lowest class.
Although there are indeed powerful Goblins that break through classes, they are basically postnatal mutations, having no relation to the strength of the parent body.
Some people simply believe that Goblins are actually parasitic creatures, but even if parasitic, there shouldn't be such strong stability.
The Warlock Guild people have conducted some research on this, and the purpose of the research is very simple.
