>>96104756Dragons, particularly the primordial dragons (Aguabrial, Dardondakal, etc), can magically spontaneously create an egg out of thin air if they feel love to another creature. Sadida extracted the elements of the Wo12 to create harmony from the dragons and their eggs via his sex dolls.
Echo is obviously part dragon, so it's not that much of an asspull if she can spontaneously bust out an egg out of love too if she and Oropo tried harder, or something.