Armor Class 17 (natural armor)
Hit Points 127 (17d10 + 34)
Speed 40 ft., fly 80 ft., swim 40 ft.
Saving Throws DEX +4, CON +5, WIS +5, CHA +6
Skills Intimidation +9, Perception +8, Stealth +4
Damage Resistances cold, necrotic
Senses blindsight 30 ft., darkvision 120 ft., passive Perception 18
Languages Common, Draconic, telepathy 120 ft.
Challenge 7
Amphibious. The dragon can breathe both air and water.
Multiattack. The dragon makes one Bite attack and two Claw attacks.
Bite. Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit: 14 (2d10 + 3) piercing damage plus 3 (1d6) necrotic damage.
Claw. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 3) slashing damage.
Desiccating Breath (Recharge 5–6). The dragon exhales yellowish necrotic energy in a 30-foot cone. Each creature in that area must make a DC 13 Constitution saving throw. On a failed save, the creature takes 28 (8d6) necrotic damage and is weakened until the end of its next turn. A weakened creature has disadvantage on Strength-based ability checks and Strength saving throws, and the creature's weapon attacks that rely on Strength deal half damage. On a successful save, the creature takes half as much damage and isn't weakened.
Fizban's Treasury of Dragons, p. 223