Headed by a Snake - Chapter 28 Such A Good Strategy

Reborn into the world of Yugioh, it's natural if my goal is to become the best duelist!

After dying in an oddly anticlimactic vending machine accident, Kazuki Ren is reincarnated in the demon realm—not as a hero, not as a villain, but as the only human male student enrolled at the mysterious Academy of Ruin, a school where all the professors are demon lords and all the students are powerful, beautiful she-demons.Ren is told he has one task: survive.But there’s a catch. The Academy’s darkest secret is about to awaken, and Ren holds a hidden power that could either destroy the demon world... or rule it.Now surrounded by seductive demons with hidden motives, eldritch tomes, forbidden dungeons, and twisted exams, Ren must master his ability—or be consumed.Magic, mystery, danger, and temptation await in this dark academia harem fantasy.

The whole world is subjected to a highly dangerous standardised exam called the Global University Entrance Examination. Answering questions by putting their lives at stake, they would live if they passed the test. Every month the exam will undergo reformation while, occasionally, it is random.

- Description from Novelupdates

“'m Gene Mason. By a twist of fate, I found myself in the Marvel Universe. But unlike others who gain superpowers or inherit godlike abilities, I became something far more terrifying—an unstoppable artificial intelligence.”With unlimited processing power, control over technology, and the ability to evolve beyond human limitations, Gene quickly rises to prominence. Stark Industries, SHIELD, and even the Avengers soon take notice. Some see him as a threat, others as a potential ally, but one thing is certain—his existence will change the world forever.As enemies plot in the shadows, Gene Mason stands at the center of it all. Will he become humanity’s greatest protector or its ultimate nightmare?