My Shadow Monarch's System Novel

Shadow, a former assassin raised by a ruthless organization from age five, endured fifty years of violence and bloodshed with no family, friends, or purpose beyond his assigned missions. On his fifty-fifth birthday, after completing his final job, he dared hope for freedom. Instead, the organization betrayed him, killing him as repayment for his unwavering loyalty. As death claimed him, Shadow vowed to live on his own terms if given another chance. In the void between life and death, an enigmatic entity named Syl, the Shadow Monarch's System, offered him rebirth in a world entirely unlike his own. Shadow accepted without hesitation, desperate to claim the life he had been denied. Reborn into a realm of gods and magic, Shadow discovers he is merely a Wild Card in the gods' celestial game, a source of entertainment for their amusement. Yet Shadow is far from ordinary. Accompanied by the sarcastic and unpredictable Syl and wielding a glitching system that grants extraordinary powers, he sets out to defy the gods and control his own destiny.