He sort of had the feeling that he had unintentionally intruded into a dangerous domain that he shouldn't have stepped into at all!
It was impossible for the Fairy to have absorbed so many bloodline genes just by relying on its own ability. So there was only one possibility: the fragments of bloodline genes were being stored by the Mage Tower. When that place had been abandoned by the Fallen Mages, the Human-faced Flower that was lucky enough to survive had absorbed the other bloodline genes, and so had grown into an Mage level Fairy.