'Not much change to the body. Looks like this Devil Heart Dao mainly cultivates the Devil Will and Devil Heart.'
According to the records on Devil Heart Dao, the most critical part of this secret art consisted of accumulating sufficiently powerful Yin Devil Will. The stronger and greater the Yin Devil Will, the more powerful the eventually formed Devil Heart. That, in turn, meant that the body could control more Prime Devil Energy.
Which translated into more power.
'Let's continue. I've only expended slightly more than ten units of Mental Energy.' Lu Sheng quietened his heart and continued upgrading Devil Heart Dao.
Grand Elder had once mentioned that any cultivator of Devil Heart Dao who could form three Devil Will hearts and eventually give birth to a Devil Heart would already have met the average standard in the past.