I don't see Faluzure as specially dracolich-y. I see the ever-smiling Night Dragon as a very large Shadow Dragon, with scales of a deep midnight-blue, with gems sparkling here and there like tiny stars. His wings are translucent, like clouds covering a moon, and his eyes shine like twin moons. He's beautiful to behold, in a terrifying way.
how about you make the wings of bahamut the prismatic of the metalic dragons. same with the chest scales. the prismatic color sould be accented and not just flat color to give it a soft contrast with the platinum skin. this sould add for a cool affect, just like the swirling pirsmatic colors on tiamat.