If Dragon Rearing Sovereign had hidden the true dragon's nest somewhere else, Qin Mu wouldn't have praised him for being sly. One has to know that in Disabled Elderly Village, being called sly is definitely a big praise.
If Dragon Rearing Sovereign had hidden the true dragon's nest on his body or that of the divine flood dragon king, it would be something regular people would think of, so it would be easy for one to find it. However, hiding it in dark green flood dragon's mouth was an irregular thought process which was praiseworthy.
That's why Qin Mu was not stingy with his praises for Dragon Rearing Sovereign.
The god, however, ignored him and continued to cast off his skin as he tried his best to worm out. As long as he cast off the two layers of skin, he would be able to get rid of Qin Mu and snatch the true dragon lord and its nest back.