The warcraft are indeed a very trustworthy and honest species.
If it were humans, once Zhang Menglong helped them regain their freedom, nine times out of ten, they would turn against him and take back those treasures, rather than continue to show him such respect as they are now.
But to be fair, the warcraft's realm is currently also suppressed to Level One perfect beings in this world, so even if they did turn against him, Zhang Menglong would have a hundred ways to make them regret their betrayal.
Heiqing's back is indeed large, stable, and soft. In fact, it was not a warcraft captured by the Great Magician Ainos, but was sealed within Ainos's body.
In the Cang Yuan Era, Heiqing was also a very terrifying Great Demon. Back then, Humans and warcraft engaged in a fierce war, causing countless warcraft and Humans to fall.
Both Heiqing and Ainos participated in that battle.
