I really like this monster design. Not many depictions of the devil or demons touch on the fact that they were all once angels and therefore actually appear beautiful and radiant with darkness just beneath the surface. I think this fits that criteria in a beautifully terrifying way. There’s something primordial in the lampreys maw, like the traditional view of an angel is falling away into something more easily described like a force of nature. There’s no stopping it, getting rid of it, or preventing it from coming. Almost like a storm or earthquake.