I Just Want To Slack off In Cultivation - Chapter 1776 - Memory.

A man reborn, more interested in his next meal than clan politics, finds himself caught in a power play that could reshape Konoha.Uchiha Masashi has seen it all before - literally. With memories of his past lives and abilities that shouldn't be possible, he'd rather perfect his combat skills than deal with clan drama.But when the newly appointed Fourth Hokage shows up with a proposal to unleash the Uchiha's power beyond their traditional police role, even Masashi has to pay attention. The clan sees opportunity. The village sees profit. Masashi sees the threads of fate that once led to his clan's destruction starting to weave again.As the Uchiha rush to prove themselves “ten times better than the Hyūga,” Masashi walks a fine line between duty and survival.He knows too much - about the Nine-Tails incident that could destroy his clan's reputation, about young Shisui's tragic destiny, about the wheels already in motion.The question is: will he bother trying to change any of it?After all, in a world where even the strongest must sometimes bend to fate, sometimes the smartest move is to grab some dango and watch it all unfold.

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

Year 2056, in a city in the Yuan Jiang Su Jin area. On top of a ruined, shattered six story residential apartment sits a teenager wearing a combat vest, militaristic trousers, and alloyed battle boots. On his back is a hexagonal shield and equipped is a blood-shadow battle knife. He sits there silently on the edge of the roof. At this time, the sparkling sky was shining and there was a refreshing breath within the air that blew towards him. However, there was only silence within the ruined, deserted city, with an occasional howl that makes your heart skip a beat.

He was the continent’s strongest and most revered alchemist, Ye Zifeng. He was under one person and above millions. However, due to an unpredictable event, he had died. After his rebirth, he had become the supertrash of the Ye family and suffered disgrace. To make matters worse, he had an argument with his fiancé that led to the break off of his engagement. In this second life, he will work to change his own destiny. He vows to return to the peak of the world, trample on those who laughed at him and rewrite his legacy!

- Description from Novelupdates