I Evolve By Devouring Everything

In a different world where monsters and beasts run rampant, I was ambushed and became a stray puppy. At the moment of death, I awakened my devouring system and inherited the bloodline of ancient beasts. Since then, I have evolved by devouring all things, transforming from a weak creature to a strong one that intimidates the world. I made a contract with a person with the ability to recognize pearls, ventured into a dangerous and secret realm alone, faced ancient beasts, devoured and transformed all the way, and finally reached the pinnacle of power in this world.