The Truth of Magic - Chapter 666

A phoenix is a creature of legends, a wonder of the world, an imagery of life and destruction. This fabled creature signifies the rise of a hero in a virtual world where battles occur for the sake of honor and glory!

Zhang Yang was a professional gamer in the first and most fantastic game that revolutionized the world: God’s Miracle. A game where traditional knowledge in RPGs did not matter anymore, players would have to manually target and evade attacks, giving rise to a significant gap in skill between a professional and an amateur gamer.

Zhang Yang’s downfall came a little too soon. His girlfriend was snatched, his guild was harassed and disbanded, and he was even driven to commit suicide! Jumping off the top floor of a hotel, Zhang Yang seemed as though he was soaring like a phoenix. Little did he know that the end of his life also signified his rise from the ashes.

- Description from novelupdates

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

Luo Qing Chen is a wandering spirit that died thirty thousand years ago, roaming the Chaos Space

In order to not turn into dust, she is bound by an ice cold system to travel through time and space to complete missions.

Girls that pretend to be weak?  Slap them without explaining.

A silly cannon fodder?  Helping them amass treasures.

Meeting a real male god?  All of them will pamper.

System: Dear masters, what do I do if my host even dares bully the heavens?  Waiting for an answer, it’s urgent!

A certain male god: Change systems.

System: ヽ〔?Д?〕丿

- Description from Novelupdates

The story is about a a hitman, Who dies because of his own recklessness and transmigrates into a game he used to play after his retirement as a hitman.I'm not gonna spoil any further, but i might answer few of your questions.Is MC overpowered?Nope, he'll become strong over time and all battle he'll fight will be because of his effort and techniques.Is there magic and adventure?Yes! It have both magic like normal isekai with adventure and fighting with monsters and many other things. There are other important things like “Essence Stone” But let's talk about it in the chapters.There will be harem?Not really, He will be in contact with many beautiful female and males but one waifu but i haven't decided yet.All i can say is, give it a try, I'll try my best to make it worth your time.