Medium Dragon, lawful evil
Armor Class 17 (natural armor)
Hit Points 38 (7d8+7)
Speed fly +60, swim +30, walk +30
Challenge 2
Saving Throws cha +3, con +3, dex +3, wis +2
Skills stealth +3, perception +4
Damage Immunities poison
Condition Immunities poisoned
Senses blindsight 10 ft., darkvision 60 ft., passive Perception 14
Languages Draconic
Amphibious. The dragon can breathe air and water.
Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 7 (1d10 + 2) piercing damage plus 3 (1d6) poison damage.
Poison Breath (Recharge 5-6). The dragon exhales poisonous gas in a 15-foot cone. Each creature in that area must make a DC 11 Constitution saving throw, taking 21 (6d6) poison damage on a failed save, or half as much damage on a successful one.
Source: 5e Core Rules · OGL/Open