Core pills, generally, can only be nurtured within the bodies of powerful Fierce Beasts and Demon Beasts.
However, only Fierce Beasts and the peak creatures of Cloud Skies Continent, the 'Demon Emperors', leave behind core pills after death.
As everyone knows.
Once a Fierce Beast breaks through to the 'Peep Naught Realm', it is considered transformed into a 'Demon Beast'.
From the moment of transformation into Demon Beasts, the 'core pill' within their bodies forms a symbiotic relationship with their strength.
This type of symbiotic relationship can't be dissolved unless one breaks through to the 'Martial Emperor Realm'.
This also leads to the reality that ordinary Demon Beasts, even if killed, won't leave behind a core pill.
Because at the moment of their death, the core pill shatters along with the dissipation of their strength.
