[Participant in the Royal Road Writathon challenge] Completed the Writathon In a world teeming with war, where power reigns supreme, a sick and starving boy finds himself at death's door. Just as he's about to succumb to his fate, a malevolent demon offers him a twisted opportunity for a new life. Reincarnated into the form of a lowly leech, the boy's consciousness merges with this unassuming creature. Yet, this is no ordinary rebirth. Gifted with the ability to evolve and level up, he enters a world where survival is paramount, and strength is the key to advancement. Thrown into a realm of ruthless predators and formidable adversaries, the boy-turned-leech must navigate a treacherous landscape where every encounter could mean life or death. With each evolution, he gains new powers and abilities, slowly transcending his humble origins. As he struggles to adapt to his new existence, the leech discovers the demon's sinister agenda - to observe his journey for entertainment. Determined to defy his malevolent puppeteer, he sets out on a quest for self-discovery and redemption, driven by an unyielding desire to gain power for freedom. With allies and enemies alike crossing his path, the leech embarks on an epic odyssey of growth and transformation. But as he delves deeper into the secrets of evolution, he realizes that the true challenge lies not in overcoming external foes, but in confronting the darkness within himself. In a world where power is both a blessing and a curse, the boy-turned-leech must forge his own path amidst the chaos, battling against the odds to carve out a destiny that is truly his own.  A new story by D.C.K.