Amphibious. The dragon can breathe air and water.
Multiattack. The dragon makes three attacks: one with its bite and two with its claws.
Bite. Melee Weapon Attack: +8 hit, reach 10 ft. Hit: 16 (2d10 +5) Piercing dmg.
Claw. Melee Weapon Attack: +8 hit, reach 5ft. Hit 12 (2d6 + 5) Slashing dmg.
Breath Weapons (R 5-6):
Lighting Breath. 60-foot line 5 ft wide. DC 15 Dex save (half dmg) 55 (10d10) lightning damage.
Repulsion Breath. 30-foot cone, DC 15 Str save or pushed 40 feet away form the dragon.