Meanwhile, emerald and black light swirled around both Yvonne and Gulistan, fueling their bodies with vast waves of devil force, while their hearts turned into Devil Hearts. Though the Devil Road wasn't and didn't affect bloodlines, it was a system of its own. The Devil Road built its foundation on the heart, transforming it into a Devil Variation of what it previously was. The completion of this process that Konrad dubbed Devil Conversion was the unavoidable step to reach the Heart Devil Realm.
And among other things, Heart Devils could control the fear, longing, dreams, desires, and demons within a cultivators' heart. On the Three Realms' scale, even an early-stage Void God should thread carefully before an early-stage Heart Devil's abilities. Moreover, Konrad didn't doubt that in terms of same-level battle power, devils were unrivaled within the Omniverse.
