My Soul's Last Sunset

I was once Tanavun, the peerless Alchemy Emperor, the master of life and death who could brew immortality in a cauldron. Then, a catastrophic backlash from the forbidden ‘Celestial Meridian Unraveling’ technique shattered my soul, casting me into the void. Millennia later, I awaken in the body of my own distant descendant - a sickly, talentless boy named Kiri, on the day of his arranged marriage to a woman who despises him. This new body is a wreck, riddled with broken meridians and on the verge of collapse. Worse, I soon discover the horrifying truth behind my fall: it wasn't an accident. It was the first activation of a bloodline curse, and my reincarnation has just triggered the final countdown. In one year, the Kiri bloodline will be wiped from the annals of history, its memory, existence, and every member erased as if they never were. Now, I must use my past-life knowledge to forge a new path to power, all while putting on a shameless, cheeky front to mask the terror of my impending doom. Can I defy fate itself, or will my soul's last sunset be the end of everything I ever was?