Apocalypse: I Build A Doomsday Train - Chapter 10 - 6 Do Not Insult the Beasts

A teenager named Evan Mason was reincarnated into the magical world of Harry Potter and goes to school at Hogwarts!
With only his knowledge of the future and great talent for magic, he takes the path towards the top of the magic world, only to realize that ever step he took, changed everything!

- Description from Novelupdates

A surgeon accidentally got the blessings of a system, shocked the medical industry, and rejuvenated countless people.

- Description from Novelupdates

During her cultivation practice, Nie Yinzhi encountered a mishap and nearly fell into qi deviation. After emerging from seclusion, she discovered she could see floating subtitles above her head.From these danmu (bullet screen comments), she learned that she was merely a substitute supporting character in a novel.Everyone in her sect doted on and loved her only because her eyes resembled those of the beloved senior sister who had perished ten years ago.And in three days, that blind senior sister would return to the sect—Nie Yinzhi would have her core forcibly removed by her master, her eyes gouged out by her senior brother, and ultimately die alone.Armed with spoilers from the danmu, Nie Yinzhi set up a forbidden array, sacrificing her soul to summon the novel’s antagonist – the great Demon Lord.Covered in blood, amid everyone’s terrified gazes, she coldly smiled and said, “If that’s how it is, then none of you shall live!”The Demon Lord appeared slowly in his dark robes, reaching out to wipe blood from the corner of her mouth: “You’re so young, why harbor such deep resentment? If there are any misunderstandings, we can sit down for tea and talk things through. Why resort to violence?”Nie Yinzhi: “???”Is this the ruthless, evil Demon Lord everyone spoke of?![The Demon Lord says no with his mouth but his actions prove otherwise. Don’t worry, it’s not frustrating, feel free to dive in.]Gu Jiang: Today my wife is asking me to kill againNie Yinzhi: Today the Demon Lord is preaching virtue to me againCultivation World: Being persecuted again todayLaid-back retired veteran couch potato Demon Lord male lead VS grudge-holding can’t-take-any-grievance female lead[[Warning: As you can tell from the synopsis, the female lead isn’t designed to be morally good! She has character flaws! She’s not a perfect victim! She won’t wait until they actually remove her golden core and gouge out her eyes before fighting back! Proceed with caution if this bothers you!] ]