The Crimson Blade. The Sundered Crown Saga

In a realm where shadows and sorcery conspire, the Crimson Blades are a name whispered with dread and awe. When Valyn, a humble merchant of humble origins, witnesses the merciless slaughter of his beloved wife and child by the merciless Knights of Niveren, their crime - the mere act of wielding magic - he vows to exact a brutal vengeance that will send tremors through the Kingdom of Delfinnia. Embarking on a perilous journey for retribution, Valyn finds himself entangled in a web of intrigue woven by the realm's criminal underworld.
Along the way, he stumbles upon an ancient and malevolent force that tempts him with the unimaginable power he craves to fulfill his dark desires. In his hands, the legendary Crimson Blade becomes a harbinger of death, transforming him into an indomitable slayer of his enemies. But power comes at a grave cost, and Valyn must confront the ultimate sacrifice - relinquishing his very soul. In this tale of vengeance and redemption, the battle between darkness and light will determine not only Valyn's fate but the destiny of an entire kingdom.