silver dragons are also called shield dragons... silver dragons also LOVE humans and elves... 

An idea:

hardy dwarf in shiny silver armor bearing the holy symbol of Bahamut, who constantly shows their knowledge of dragons and their culture, even claiming to have climbed Mt Celestia, the afterlife of lawful good people, and one of the hardest afterlives to claim as yours. The dwarf will occasionally disappear, only to have seemingly accomplished impossible feats, sometimes seen trying to drag the corpse of a fallen troll he seemingly felled himself, or carving the skin of several now dead owlbears, all without flinching, and all without wavering faith in his deity. Finally, after many months of adventuring, the man seems to grow concerned, worried even, as you trudge through a swamp apparently harboring some extremely powerful ancient evil. Bubbling pools filled with noxious liquids and the smell of sulphur are all that you can think of, as a threat unknowingly stalks in the distance. Suddenly, the cleric strips of his armor, now clad in nothing but his basic clothes. He hurriedly warns you not to follow him, that something is near. He sprints off before you can reply. Around half a minute later, you hear the screech of a colossal creature, the thuds and flaps of massive winged creatures battling to the death. They crescendo into a beautiful silhouette in the sky, the distant but still beautiful colors and contrasts of matte black and shimmering silver dulled by the nearly tangible melancholy of the area around you. Suddenly, one falls with a final screech, crashing in the distance, and the apparent curse on the land around you seems lightened. The sky slightly clears to reveal the unmistakable, muscular form of a glistening silver dragon, now wounded, its body painfully faltering as it descends in the distance. A graceful thud is all that is heard, and not a minute later, the dwarf rushes to you, gashes reigning over his body more than healthy skin, strange greenish black liquid lightly sizzling on his body, as he gives himself one final shake, slinging the liquid off, before picking up his armor without a word, and putting it on again. "So, what're we doin' now?" He asks, his voice, and seemingly his faith, unfaltering and nearly untested. Realizing that you won't answer, he smiles, before giving a hardy, slightly labored laugh, as he leads the way trough the treacherous swamp, which is now beginning the process of recovering from the nightmarish beast just as its protector, the dragon in disguise, is as well.

I wouldn't recommend describing anything in your game this way, despite how good I tried to make it sound. Try to show the beast's abilities, give a simple description, let the combat talk for itself and let your players imagine most of what's happening instead of this. Unless this is the climactic end of a long journey, nothing should be described this way. Think of it more like how video games do these things: let the gameplay and the visuals, voices, etc it offers do all the talking, except in particularly emotionally high moments where great description is needed.

Maybe the town seems lawful, but has a seedy underbelly that the silver dragon has been investigating for centuries? And the seedy underbelly attacked someone that they very much care for

it doesn't attack, it "covet the lost outposts of humanoid civilization", meaning that humanoid civilization has all ready moved out, and the dragon takes their place

Well... Off to hang myself

I found one of these in a dungeon and managed to befriend it, super hyped

i love silver dragons 

i got silver dragons spirit magic 

I love silver dragons, they are my favourite