Li Cheng sensed for a long time and found that the Killing Law, Dark Law, and Law of Death were omnipresent, unlike the rule of Devouring, which was concentrated within Dragon Mountain.
That is to say, this Refining Dragon Prison might have been constructed with these three laws, meant to contain Dragon Mountain!
If that was the case, then the previous speculation could be explained; the Dragon Clan's ancestors built this Refining Dragon Prison to house Dragon Mountain, and at the same time threw clan members who had committed grave offenses into it, ostensibly as punishment but actually to maintain the vitality of the Devouring Ancient Dragon's Divine Origin.
Since that was so, now that he had taken the Nine Dragons Devouring Sky Tripod and given the power of the bloodline of the Devouring Ancient Dragon to the Dragon Emperor, the Dragon Clan must have noticed or would notice once he left the Refining Dragon Prison.
