Time flew.
Su Ping traveled in the desolate land with the Dark Dragon Hound and the rest of his pets, always looking for God Emperor beasts as sparring partners. Those creatures were much weaker than the Rain Clan's God Emperors; after all, theirs was a huge clan with a large heritage of ancient secret techniques.
While training his pets, Su Ping was also constantly deepening his understanding of the Contract Dao Heart. His experiences through consecutive battles and his own observations made him feel that it had impressive potential, not inferior to the three unparalleled Dao Hearts shown by the Golden Crow ancestor. He was delighted.
It would have been disappointing if his own Dao Heart wasn't as good.
Dao Hearts couldn't be transmitted. The Dark Dragon Hound and his other pets were still God Kings. They could still fight God Emperor beasts on their own by teaming up and following his commands, the gap was huge.