Urnati Silver Dragon

Actions

Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 9 1d10+4 piercing damage.

Breath Weapons (Recharge 5-6). The dragon uses one of the following breath weapons.

Cold Breath. The dragon exhales an icy blast in a 15-foot cone. Each creature in that area must make a DC 13 Constitution saving throw, taking 18 4d8 cold damage on a failed save, or half as much damage on a successful one.

Paralyzing Breath. The dragon exhales paralyzing gas in a 15-foot cone. Each creature in that area must succeed on a DC 13 Constitution saving throw or be paralyzed for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

The Urnati Silver Dragons were once plentiful, respected and welcomed. They were on Urnati long before anyone can remember. Smaller in stature than later dragons, even the largest were no more than 15' snout to tail.
 
After The Cataclysm, DNA changes to the dragons resulted in much larger dragons but far fewer of them.

The Urnati Silver Dragon preferred colder climates and high places. You most likely would find them soaring on updrafts near tall mountains and making lairs near mountain tops