It's actually just an ordinary power of Devouring.
However, after Duo Lai evolved to a Perfect Legend, the Power of Devouring Heaven and Earth was elevated to Great Power. After Duo Lai's Ascension, Great Power was further elevated to Supreme Power.
Indeed, it's still Great Power, but between Great Power and Great Power, there is a gap like the Sky.
Now, Duo Lai's Power of Devouring does not just devour appearances, but the root of a Saint!
If a Saint manifested their Root Imprint and it was devoured by Duo Lai, the Root Imprint would never be able to recover. Even if they fell and then revived, they could not reshape the Root Imprint.
It would be permanently cut away.
One devouring is an eternal devouring; this is the terror of the Supreme Power of Devouring Heaven and Earth!
The True Kings' kingdoms of will are similar; once the kingdom is completely devoured, they become... a defective True King without a kingdom!
Forever a disgrace to True Kings!
