Isaac - Chapter 73

Reincarnated in a magical world with INTERNET POWER?Nolan, a failed teacher, dies and wakes up in a ruined fantasy world—in the body of a Mana Specialist—a magic instructor who helps wizards and knights control the dangerous, corrupted mana flowing through their realm.The problem?The body’s former owner made a deadly pact with a succubus and was hunted by his noble family. Worse still, Nolan doesn’t know a single thing about being a magic specialist that could’ve helped him tremendously in his troubled situation.Just when he thought all hope was lost, Nolan gains access to the Internet. Not just Earth’s version, but this magical world’s version too.Need a face slap? Buy an internet promo to gain access to the knowledge wherever he needs.Succubus problem and strengthening up? Play inside the game and get stronger in real life too.Sometimes, to solve magical problems, all you need to do is browse.

Kaden awakens once again at the dawn of Earth’s cataclysmic “System” invasion, armed with haunting memories of his previous nightmare life. Desperate to overturn his grim fate, he sets his sights on a special druid class—only to unlock a legendary hidden class!A druid who had to devour to become stronger!With every enemy he devours, the madness increases. The nature twists and contorts in his presence. Plague spreads where he goes. The cursed forests become his grove.Would the fallen druid be able to face the twisted alchemist who once enslaved the entire planet? Can Kaden master this cursed power to save humanity—or will it consume him, turning him into the very evil he seeks to destroy?

A guy became a brother of Iron man and got the ability to extract genes from anyone. Lets see how he changed the Marvel World

- Description from Novelupdates

A polite and lethargic boy was reincarnated in another world as a vampire bishoujo.