Cultivation of Immortality Starts from Becoming the King of Beasts

In the world of cultivating immortals, the Beast King System has awakened. Is this true? Eh? My big black dog can actually advance and has a hidden bloodline? Oh? Can I still inherit the skills of fairy beasts myself? From now on, in all corners of the world, in the secret realms of mountains and rivers, which monster dares to stop me?