Bloodline witchcraft comes in many forms, and aside from the Bloodline Seeds that Richard was most familiar with, the most popular in the Wizard World was the hybrid path.
This path allowed for the fusion of bloodlines, thereby obtaining some special talents or abilities of Aliens. The price, however, was the transformation of both physical form and mind.
The physical body and spiritual power of a creature are not isolated entities; they are closely linked. When a creature's body changes, its mind will also subtly shift.
Such changes can only be slowed but are inevitable.
Richard was never fond of this path. Although he wasn't a staunch advocate of humanism, he was extremely cautious about changes to the mind.
Physical changes, for a wizard, especially an Alchemy Wizard, were trivial.
Wizards who underwent mechanical modifications looked even less human than those half-blood Wizards. But such changes of the mind sparked a deep-seated fear in Richard.