Heart Devil, more than just a saying, an actual intangible Being that is a representation of inner wickedness. It is birthed once, during a mortal’s Evolutionary Ascension, by a union between utmost desire and Nature.
Its reason for being is an instrument for Nature's retaliation. Nature loves mortals and abhors Immortals, for it, they are all Beings that liberated themselves from the cycle of life to rein free in its cosmos and abuse its laws and elemental energies.
As a sort of obstacle and punishment, the Heart Devil nips at the culmination of the mortal Martial path, spoiling it. If not stopped, it will devour the entire cultivation base, leaving the ascendant bare to endure the Evolutionary Ascension, a death sentence. Caught and vanquished on time, a Heavenly Immortal would be born
