Let You Control the Beasts, and You Launch a Tide of Beasts?

In the era of beast control, the rules have been subverted. Only by controlling powerful spiritual beasts can we stand at the top of order! Ye Luochuan, the adopted son of a beast-controlling family who had high hopes, unexpectedly only awakened the Chocobo in the streets during the much-anticipated awakening ceremony. He was destined to live a useless life and became the laughing stock of the whole city. Overnight, his reputation as a genius was deprived and he was ruthlessly expelled back to the outer city, which made him see clearly the warmth and coldness of human nature. But as a time traveler, he has actually secretly awakened the spirit beast training system. Through killing, he can improve the spirit beast's qualifications in all aspects and continuously evolve. Even the least qualified Chocobo can grow into a giant! What's more, this chocobo is far from that simple... ------ But just when Ye Luochuan, who holds the system in hand, is preparing to hibernate and develop, his former companion wants to get his hands on his biological sister! Even these behaviors were supported by his former adoptive parents! Ye Luochuan thoroughly saw the so-called human order, and the only thing that could respond to them was a wave of annihilated beasts! Let me rewrite this rule!