Sword Art Online - Vol 4 Chapter 0: Prologue

As a corporate drone, Ashu was transported to another world, hoping to live a life free from societal pressures.However, he quickly found that even marrying a village girl would cost him half of his wealth!Fortunately, just when things were looking grim, his childhood sweetheart—who had trained for many years—arrived to fulfill their childhood marriage pact. Not only that, Ashu activated the Crit Refund System, which allowed him to earn rewards by binding with beings rated over 90 points![Binding with the Witch Childhood Sweetheart, 10x Refund on Magic Potion, Host Gains: Forbidden Water (S)][Binding with the Forest Elf, 10x Refund, Host Gains: Infinite Stamina and Infinite Recovery][Binding with the Demon Huntress Nun, 20x Refund, Host Gains: Demon Slayer Holy Crossbow (SS)][Binding with the Imperial Princess, 100x Refund, Host Gains: Sigh of the Heavenly Father Spear (SSS)]Ashu: “The refund multiplier increases as our relationship grows? I’ll definitely have to dive deeper into this!”

Brolin, the nine emperor of the Black Dragon Mountain Empire, accidentally obtained the system of the realm of the world, and began the legendary journey of the battles!

In the Naruto world, with his star power, he overwhelmed the shadow-level powerhouses, grabbing reincarnation, and becoming a ten-tailed person!

Fighting the mainland, he led a large group of lords, surrounded the ancient eight clan, and confronted the peak Dou Sheng!

Covering the sky, he broke into the restricted area, seized the emperor’s scriptures and immortal medicine, and called the Lord of the human universe to fight supreme, and the sky was falling apart!

In the eternal life world, he crosses all realms, and fights against the Supreme King of Stone with the attitude of eternal true God!

Immortal continent, he jewels Jiuyang, looks down on immortal ancient, strong sky!

The perfect world, he runs across the sea, suppresses the heavens, and the Zhunxian Emperor must retreat!

Thinking of the eternal world, he ascended to the realm of Supreme Hunyuan, the fifth step of the war, Bai Xiaochun!

Heaven and earth, this is an epic of the black dragon!

- Description from uukanshu

What happens when a fanfic author with a habit of lying and scheming suddenly finds himself as a self insert during Duelist Kingdom? What happens when you have Yugi, Joey, Kaiba, and the rest encounter someone who knows all about every major player in their saga... and sees no problem with abusing said knowledge? Chaos, dear reader. Sweet, sweet chaos

The once-bustling and noisy streets were now filled with an eerie blanket of silence.

Hoarse and frenzied whispers lingered high above the heavens, and an indescribable ancient giant lurked in the shadows of the bottomless ocean.

A mysterious plague had outbroken, and natural disasters wrought the Earth. Global pandemic and catastrophes had the panicked masses seeking illusory shelters from the devastation, day and night.

A bloody shower poured over the land as the streaks of lightning tore across the sky, illuminating the ill-intentioned gathering of ravens above. Nevermore, nevermore, quoth the ravens.

“We can see that this malformed creature has twelve pairs of ribs like humans, but also has a “transverse bone” that humans do not possess…”

In the medical school, Gu Jun continued bringing down his scalpel, illustrating the abnormal thoracic structure of the malformed cadaver on the dissection table to the surrounding students.

Ominous and treacherous times had descended! Truth and logic had crumbled, order warped into a frenzy. Humanity can only forge ahead through the power of intelligence and wisdom.