Large dragon, lawful evil

Armor Class 18 (natural armor)

Hit Points 136 (16d10+48)

Speed 40 ft., fly 80 ft., swim 40 ft.

STR DEX CON INT WIS CHA
19 (+4) 12 (+1) 17 (+3) 16 (+3) 13 (+1) 15 (+2)

Saving Throws Dex +4, Con +6, Wis +4, Cha +5

Skills Deception +5, Perception +7, Stealth +4

Damage Immunities poison

Condition Immunities poisoned

Senses blindsight 30 ft., darkvision 120 ft.

Languages Common, Draconic

Challenge 8 (3,900 XP)

Amphibious. The dragon can breathe air and water.

Actions

Multiattack. The dragon makes three attacks: one with its bite and two with its claws.

Bite. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 15 (2d10 + 4) piercing damage plus 7 (2d6) poison damage.

Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) slashing damage.

Poison Breath (Recharge 5-6). The dragon exhales poisonous gas in a 30-foot cone. Each creature in that area must make a DC 14 Constitution saving throw, taking 42 (12d6) poison damage on a failed save, or half as much damage on a successful one.