The Oath of Shadows. The Last Immortal, #46

The Oath of Shadows is a dark, emotional gothic romance set within the haunting walls of Blackstone Manor, where immortals, relics, and forbidden magic intertwine. Roman, an ancient vampire bound for centuries to a sacred oath, has lived a life defined by loss, duty, and eternal isolation. When Emil arrives-an ordinary man carrying the mark of a powerful and awakening relic-the fragile balance of Roman's existence begins to collapse.
What begins as protection becomes connection. What begins as duty becomes desire. And what begins as fate becomes a dangerous rewriting of destiny itself. As vampire hunters rise, ancient secrets awaken, and a powerful elder manipulates events from the shadows, Roman and Emil are forced into a journey through memory realms, shadowlands, and the deepest truths of their pasts. Every step pulls them closer to a devastating truth: the relic does not simply choose a vessel-it demands a bond that can reshape immortality itself.
But love between a cursed immortal and a marked vessel is not without consequence. Roman must confront an impossible choice between the oath that has defined him for centuries and the man who gives him a reason to exist beyond darkness. Emil, in turn, discovers that survival may require more than sacrifice-it may require rewriting the very rules of shadow and light. In a final confrontation where love becomes the most powerful magic of all, the relic is transformed, the oath is broken and reborn, and eternity itself is redefined.
At its core, The Oath of Shadows is a story of healing after centuries of grief, of love born in darkness, and of two souls choosing each other against fate, fear, and immortality itself.