Quadruplets' Charm: The Tycoon's Hidden Heirs - Chapter 40 - Keep it down there are bad guys around

Athena Grant,a human,dies in a car accident and becomes Eira Liora,an elf. Transported to the barren and cursed island of Luinmir, a once-thriving land now abandoned.A year ago,their King announced that the island,Luinmir would no longer be under the empire's control. It was well known that the land was barren and poverty stricken...She was abandoned both by her Kingdom and her Father.She wakes up one day with a system.“So what if they were abandoned and deemed cursed,she would show them all the highest peak of knowledge and development. The island's core is broken...fine,she'll get it replaced but this time,the island would become hers to keep,she would make sure of that.”

Will you forgive them or seek revenge? Forgiveness and revenge are, after all, the two inevitable outcomes when faced with betrayal—rather, the two sides to behold of the same coin. No matter how many times forgiveness surfaces, revenge is equally likely to occur.This is the tale of a man who has endured countless betrayals throughout his life. One might even say he's been betrayed by his own fate. Yet, he has always chosen to forgive and move forward with a cheerful smile. Revenge never really occurred to him— not even once.However, his life took a dramatic turn when he gets involved in a tragic accident, meeting a miserable end. But fate had other plans, and he was reincarnated in a different world. With his newly acquired body, he starts his life as a Mage Class Adventurer, only to face the dark reality of the world. The atrocities he witnessed—enslavement, smuggling, trafficking, and so on—were nothing but the tip of the iceberg. The Dark Morals of the world remained untouched.What secrets lie hidden? What darkness shrouds this world? One must join him on his journey to discover the truth. As he continues surviving in this new world with certain ambition and purpose, he also acquires a 'System' to enhance his potential. With each level and skill upgrade, he conquers the chaos and earns a title no one ever will ever be able to attain.[“Do read if you feel like reading my creation. Your support is what gives me inspiration to carry on”— El Sandra.][Note: My novel contains violence and harmful events. Reader discretion is strongly advised]

An ordinary student, a wretched peeper, a cowardly teenager with a kind heart. In a terrorist attack, he inherited the knowledge of countless elites, embarked on a path of God Jagged Tu…

He is an artist!

He is a mathematician!

He is a psychology Doctor!

He is a master of fighting!

In fact, he is a man

Taken off raw site:

A wretched, dirty young man is working during the summer when he was caught up in a mysterious explosion. After that explosion, the young man is then left with the memories and knowledge of dozens of the world’s experts.

He has changed, his heart has become cold, iron-blooded. He became a killing machine, his mind turned mechanical, calculative. Everything goes according to his plans and calculations!

In this magical, slaughterous world, a door is opened for him…

- Description from Novelupdates

I fell into a game world out of nowhere with an instant kill skill.
And then somehow, I became a bigshot.