Reborn: Earth Online

Kaden awakens once again at the dawn of Earth’s cataclysmic “System” invasion, armed with haunting memories of his previous nightmare life. Desperate to overturn his grim fate, he sets his sights on a special druid class—only to unlock a legendary hidden class! A druid who had to devour to become stronger! With every enemy he devours, the madness increases. The nature twists and contorts in his presence. Plague spreads where he goes. The cursed forests become his grove. Would the fallen druid be able to face the twisted alchemist who once enslaved the entire planet? Can Kaden master this cursed power to save humanity—or will it consume him, turning him into the very evil he seeks to destroy? — Description from novelcodex.org