For the past 100 years, Demons and Beasts have descended, spreading terror across the world.
Everyone can awaken a grimoire and summon a beast during their coming-of-age ceremony.
Lucas, however, awakened the weakest grimoire and, with it, the weakest beast—a small dog that possessed no combat abilities.
Fortunately, as a transmigrator, Lucas also mysteriously activated a system that enables him to evolve his summons into their mythical beast counterparts.
Follow Lucas on his journey to greatness as he transforms his beasts into mythical creatures never seen before.
