First Legendary Tamer: Starting with 100x Growth Rate

The world is a place where beasts and men live together. In this world, where beasts are as crucial to the society as plants, 'Taming' has always been an act of becoming a deeper part of the nature. We are not simply creatures of nature, with the help of the beasts, we take a step forward and lock into a world beyond our natural limits. However, Professor Sam was a genius that could never tame these beasts. He may have changed the world with his methods, but he was not the same as the others... at least, until he died. And came back to the past with a litral Myth by his side. — Description from novelcodex.org