Everyone Has Awakened Demonic Laws, and You Contract Ants?

Shen Luo transmigrates to a world where everyone raises spirit beasts. He becomes an ordinary student in the beast-taming department at Dongcheng High School. But in this world, only the rich can raise spirit beasts and grow stronger. Born into poverty, Shen Luo can't even afford the most basic beast pet. Just then, he gains the Demon Law System. He contracts his first beast pet: an ant. And begins its endless evolution. Worker Ant → Cockroach Ant Queen → Insectoid Empress... Years later. World war breaks out, and Shen Luo declares war on every nation single-handedly. "Wait, we're all beast pets, so why does he have a whole swarm!?" "Isn't that an ant? What the hell is that thing, bigger than a dragon?" "One ant of his can instantly kill my six-winged archangel?" "How are we supposed to fight that!?"