According to the Divine Power Refining Method recorded in "Demon Transformation,"
the first step is to temper the body with Demon Blood, shaping the physique in preparation for the sacrifice and refining of the Demon Essence and to draw it into the body for foundation establishment.
The second step is to refine the Demon Essence, sealing it in the Profound Acupoint as a hidden furnace fire akin to a Divine Treasure.
Chen Yuan planned to skip the first step altogether.
Because he had made some achievements in practicing the Eight Mountain Carrying Pillars, his physique was tempered to be extremely strong, on par with a Demon Body. Once he opened up the other pillars, he would surpass demons.
So, without hesitation, he prepared to draw the Demon Soul into his body for the sacrificial refining process.
However, this Essence belonged to the Mountain Lord who nearly broke through the Fourth Heavenly Barrier, so Chen Yuan would not be blindly careless.