Spellcasters are the favored children of heaven; not everyone possesses such a talent.
Wizards may look like they have a low threshold to entry, but in reality, they are individuals with spiritual mutations who through continual learning, drug stimulation, and mental enhancement, grow their spiritual power.
Then, they use this spiritual power to communicate with the energy in the void. The weak rely on rituals and materials, while the powerful can interfere with reality and control energy directly.
Magicians, however, are even more formidable, their power stemming from their bloodlines, and many pure Bloodline Holders don't even need to train to have fearsome power.
Roger always suspected that there might be some common ground between Magicians and the Blood Hunter Family.
After all, both were Bloodline Holders; perhaps they just differed in external training methods.