The Heavenly Demon in a World of Magic

In his first life, he was a sickly patient dreaming of adventure. In his second, he thought his wish was granted... only to realize the "Isekai" he landed in was the blood-soaked hell of the Murim. To survive, he had to discard his humanity, slaughter thousands, and ascend as the Heavenly Demon. Now, in his third life, he has finally arrived in the Right World. Swords, Magic, Elves, and Dungeons it is the High Fantasy world every man dreams of. And Cain Valerius is ready to enjoy it to the fullest. There is just one problem: He was born with a "Mana Void." To the people of this world, he is a cursed failure. A piece of trash with zero magic potential. To Cain? It’s just a minor inconvenience. Who needs Mana when you have Qi? The Heavenly Demon has arrived in a world of Magic. He just wants to eat good food and live a lazy life... but the world seems determined to make him a legend. Let’s see what happens when the Apex Predator of one world clashes with the laws of another.