Steel Dragon

Steel dragons, sometimes known as Waterdeep dragons, were metallic dragons who were rarely seen in their natural form, instead living clandestine lives in human cities, observing art, culture, history, and politics. Steel dragons in their natural forms were especially feline in their movements and stature. They had scales that shone like burnished steel as adults and usually smelled like wet metal.[3] Younger dragons' scales were a darker blue-gray and less lustrous.[7] Their wings consisted of overlapping blades that looked like feathers, and the scales on their chests resembled shields.
Their faces were particularly expressive, sometimes giving the illusion of a human-like face. They had many long spines surrounding their faces, which gave the appearance of hair.
In humanoid forms, steel dragons usually kept their true identities secret; however, they always had at least one visual indication of their true nature in the form of steel-gray hair, eyes, tattoos, or another feature.
Abilities Steel dragons were immune to acid and resistant to poison and especially magic. They had innate abilities to enchant and charm individuals.
Personality Steel dragons, as a rule, were amiable, curious, and witty. They would rather spend their time among human cultures than in their own true forms.
However, they had difficulty when dealing with all kinds of absolute authority, even authority that was used for good. This put steel dragons at odds with other kinds of metallic dragons that used their power and experience to justify their actions, specially bronze dragons and gold dragons; this also made them bitter enemies of chromatic dragons. For those same reasons, steel dragons usually worked within their chosen communities to promote freedom and undermine authoritarian forces.
Steel dragons liked the company of humans, elves, half-elves and dwarves, and they usually supported adventurers that opposed tyrants.
Favored treasure They preferred to invest in property and business unlike other dragons, who preferred to hoard monetary treasures. Some steel dragons did hoard items, but they preferred to hoard works of art, antiquities, books, finery, magic items or servants.
Combat Similar to brass dragons, most steel dragons would rather talk than fight, yet like all dragons, they could be formidable opponents. In combat, they avoided melee and instead relied on their magical spells. A steel dragon could cast the spells of clerics as arcane magic and also could use the spells usually considered a part of the knowledge and trickery domains. If truly losing a battle, a steel dragon was likely to teleport away.
A steel dragon could breathe both a line of acid and a cloud of poisonous gas.