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: +7 to hit, reach 10 ft., one target. Hit: 15 (2d10 + 4) piercing damage plus 4 (1d8) necrotic damage.

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

Shadow Breath (Recharge 5–6). The dragon exhales shadowy fire in a 30-foot cone. Each creature in that area must make a DC 15 Dexterity saving throw, taking 44 (11d8) necrotic damage on a failed save, or half as much damage on a successful one. A humanoid reduced to 0 hit points by this damage dies, and an undead shadowrises from its corpse and acts immediately after the dragon in the initiative count. The shadow is under the dragon’s control.