'Oops! I Stole the Isekai Lottery' - Chapter 6: The First Day of Chaos (Also Known as Classes)

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

Alexander, a world-class sales training expert and a holder of the Social Tyrant certification, found himself transported to a parallel universe, entering a world that seemed straight out of a horror story.

However, this world wasn't as terrifying as he had initially thought. In this realm, being a social maestro meant you could do almost anything you pleased.

Leveraging his exceptional social skills, Alexander turned even the most fearsome ghosts into friends. Moreover, as his rapport with them grew, he received additional rewards.

Affinity Level 60

Headless Ghost: “If you like, I can give you this head as a keepsake.”

Affinity Level 100

Female Ghost Teacher: “Darling, stay with me tonight, and let me show you what the Ice and Fire truly feel like!”

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In the past, the giants of the heavens and the gods were destroyed after the reincarnation of the world! Cruel curse, eternal hatred, Tan Yun is determined to never sink again! For the sake of loved ones and relatives, from now on, step on the corpse of the enemy step by step to surpass the peak! Defying the sky, killing all worlds, I am the only one!

- Description from novelbuddy

Traveling to the world of Hokage, Kamiyo Colt witnessed the chaos of the Nine Tails firsthand.Without any special powers initially, he planned to develop quietly and survive until the Infinite Tsukuyomi. However, when he first trained his Chakra, his system finally activated.The system's rules were simple:By healing others, he could gain random attributes and skills.“Heal Uzumaki Naruto to receive pure Ashura Chakra!”“Heal Uchiha Shisui to gain his bloodline talent!”“Heal Sasuke Uchiha to obtain pure Indra Chakra!”In this way, Colt steadily developed his abilities over more than ten years.During the Fourth Ninja World War, when the ninja coalition saw him suddenly knock out the Six Paths Madara with a single punch, he looked innocently back at them.“What? I'm a medical ninja. Doesn't it make sense to defeat him with one punch?”