MTL - God! I Turned Into a Turtle - Chapter 3 Big black mouse?

They called him useless. A Class E farmer in a world where strength meant survival.Betrayed by the woman he loved, beaten by a power-hungry King, and left to die like trash, Isaac thought his story had ended.But death was only the beginning.Beneath the earth, sealed for thousands of years, a forgotten being awakens, an ancient force of ruin once feared by angels and demons alike. When Isaac agrees to its desperate offer, he doesn’t just survive… he becomes something else. Stronger. Colder. Hungrier.Now reborn with a forbidden power that rejects magic itself, Isaac walks the line between man and monster. Each time he unleashes the Abyssal Overdrive, his strength grows, but so does the Corruption threatening to devour what’s left of his soul.To protect the innocent, he must become the very thing they fear.To destroy the kings who shattered his life, he must embrace the darkness within.Enemies will fall. Secrets will unravel. And when the kingdom of Carreon learn that Isaac is still alive… it will already be too late.The world shunned him. Now, it will kneel.

Back in 1998, an ordinary person who has been through, tired, cried, and fought, hopes to run down-to-earth and keep up with the trend of the times.

- Description from novelbuddy

Born into a wealthy family, Gu Shenwei was spoiled and carefree. However, at the age of 14, his entire family were brutally murdered, and he was caught by some bandits who sold him into slavery. As a slave boy, he entered Golden Roc Fort by chance and found the man who had slaughtered his family. He endured insults and worked hard to improve his kung fu while working as a slave boy. He learned from and plotted against his enemy under the enemy’s nose. He became increasingly ambitious as he became more and more powerful. He would only be satisfied if he completely destroyed his enemy—by fair means or foul. Gradually his bitter experience turned him into a totally different person.

Leo Lock, a reading addict with the ability to truly 'read' books, never really fit in his boring 'normal' world. However, everything changed when an unknown voice found its way to his head!

Fainting only to find himself in the body of a character from a fantasy novel he once read upon waking up, Leo barely processed his new reality before he was thrown into another whirlpool.

[Role: Reader]
[Target: Reach the Epilogue.]

The only lead he had about his 'transmigration' didn’t speak much! Even the character he took over already had a foot in the coffin! How was he supposed to survive that long? Why did he have to become the protagonist’s brother?!

Moreover, what was this Personal Book supposed to be? Reading Attributes? Points?

Follow Leo as he experiences the true life of a reader in a fantasy book, facing expected challenges, and encountering all kinds of 'new'…

Would he manage to go back and find out the reason behind his 'transmigration'? Was that even his purpose? Or was this nothing but the start of a much bigger change beyond the scope of his understanding…?

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First Volume: The Sword Master’s Second Life
Second Volume: Murim Supremacy

Note: Yes, Leo starts out with a sword, but that isn’t the limit to his choice of weapons!