Be The Superheroes' Father in Marvel X DC universe - Chapter 4: (R18) The Beginning of the Beast!

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

Roy’s life was nothing special. The only thing commendable was the last few moments when he saved a mother and her child from a drunk driver.

It’s really an egg! Damn it, what kind of monster have I become? Did I fall into Hell instead of making it to Heaven??

Join Roy as he ventures through various worlds with the Custom Made Demon King System—a system that allows Roy to draw anything he can imagine and create it through exchanging souls!

- Description from Webnovel

What would you do when you're faced with the ultimate being that is by true right Omnipotent, Omnipresent, and Omniscience?What would you do when that very being tells you it will give you anything you ever wanted?And what would you do when the ultimate being, devoid of greed, gives you the power to generate INFINITE MONEY?This is the story of a boy who gets reincarnated in a new world filled with countless possibilities and dangerous beings.Now, with the power to generate INFINITE MONEY in his hands, how will he survive in this world?Will he be used by everyone else around him....Or......will he buy them ALL?

While on a school field trip in the Czech Republic, Kang Hyuk happens to stumble into a shop called “Archmage.” To his disbelief, the shop is actually owned by an archmage… from another world! Forced to become the Archmage’s disciple, Kang Hyuk is punted into the Kallian Continent, where might and magic overwhelm and wyverns fly high in the sky…

In this world, people are either sword-wielding knights, magic-wielding mages, or spirit-wielding summoners. There hasn’t been anyone yet who can do all three… until now.