Grey Dragon Wyrmling (5e Creature)
From D&D Wiki
Grey Dragon Wyrmling
Medium dragon, lawful evil
Saving Throws Dex +4, Con +3, Wis +3, Cha +3,
Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d10 + 3) piercing damage plus 3 (1d6) cold damage.
Cold Breath (Recharge 5-6). The dragon exhales a gust of frigid wind in a 15-foot cone. Each creature in that area must make a DC 11 Constitution saving throw, taking 21 (6d6) cold damage on a failed save, or half as much damage on a successful one.