As cold blooded they prefer the heat, they can deal with cold weather but if its too cold -50 they will refuse to go further. If forced they will attack, if still forced they will end up going into a deep sleep, and will most likely not wake up from such a deep slumber . True dragons do not suffer from this as their magic help protect them.

Bite. Melee Weapon Attack: +7 to hit, reach 10 ft., one creature. Hit: 11 (2d6 + 4) piercing damage.

Claws. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) slashing damage.

Stinger. Melee Weapon Attack: +7 to hit, reach 10 ft., one creature. Hit: 11 (2d6 + 4) piercing damage. The target must make a DC 15 Constitution saving throw, taking 24 (7d6) poison damage on a failed save, or half as much damage on a successful one.

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

Shadow Breath . The dragon exhales shadowy fire in a 30-foot cone. Each creature in that area must make a DC 17 Dexterity saving throw, taking 56 (8d12) necrotic damage on a failed save, or half as much damage on a successful one

Petrifying Breath . The dragon exhales petrifying gas in a 30-foot cone. Each creature in that area must succeed on a DC 14 Constitution saving throw. On a failed save, a target begins to turn to stone and is restrained. The restrained target must repeat the saving throw at the end of its next turn. On a success, the effect ends on the target. On a failure, the target is petrified (turned into Obsidian) until freed by the greater restoration spell or other magic.