Against the Gods and Reverend Insanity Fusion Fan-fiction

An AGAINST THE GODS FANFIC... REMINDER: STORY WILL NOT FOLLOW THE CANNON... INSTEAD, THE PLOT WILL BE A MIXTURE, OR FUSION OF REVEREND INSANITY AND AGAINST THE GODS... BUT THE WORLD AND CULTIVATION SYSTEM WILL HAPPEN INSIDE THE AGAINST THE WORLD NOVEL. AND CERTAINS CHARACTER FROM REVEREND INSANITY WOULD APPEAR IN THE AGAINST THE GOD WORLD. SUCH AS, FANG YUAN, FANG ZHENG, AND MANY MORE. AS THE WORLD DEVELOP FURTHER, CERTAIN CHARACTERS MIGHT LATER APPEAR, DEPENDS ON THE PLOT OR MY TASTE(XD). NOTE AND HEAVY REMINDER: ALL PRE-EXISTING CHARACTER OR SIMILAR EXISTING-PLOTS SOLELY BELONGS TO THE RIGHTFUL OWNERS...THIS IS MERELY A FAN-FIC FOR WISH-FULFILLMENT, SUCH AS, I OWN NOTHING IN PRE-EXISTING CHARACTERS AND STORY PLOTS IN THIS FAN-FIC!!!!! And REMINDER: This novel contains heavy gores/ or death. Let me remind you in case you complain later on. And oh, to harems lover out there, this novel might not contain harem, unfortunately. .... Synopsis: Bedridden with an illness since young, Fang Yuan suffered pain and misery in his entire life. Envy and Rage would always flare to his eyes when it was revealed his parents no longer cared for his existence. He was as if cursed with disastrous karma that whoever had the thought of befriending him would suffer for eternity. No long after the last drop of his life, the last thing he saw was the joyous and relief of his parents...when he died. He hated himself...hated the existence of humans...if he was given the chance for another life...he swore to become a demon that slaughtered the existence of humans! .... Thus, a miracle happened! Fang Yuan was reincarnated in the world of mythical powers! People here wielded powerful strength that capable of splitting mountains with a wave of their hands... Not only that...Fang Yuan was accompanied by a trillion-year-old True Demon God of Ancient Era! This demon would bestow Ancient Martial Arts, knowledge, and guided his cultivation path...but the exchange for this was to satisfy the Demon’s Request... Such as killing! Follow Fang Yuan as he faces advertise on his path towards the Demon God!