Alpha Death Dog

Three-Headed. The gorgos has advantage on Wisdom (Perception) checks and on saving throws against being blinded, charmed, deafened, frightened, stunned, or knocked unconscious.

Multiattack. The Alpha Death Dog makes three bite attacks.

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 10 (1d6 + 2) piercing damage plus 5 (1d4+3) Fire damage . If the target is a creature, it must succeed on a DC 18 Constitution saving throw against disease or become poisoned until the disease is cured. Every 24 hours that elapse, the creature must repeat the saving throw, reducing its hit point maximum by 15 (1d10+5 ) on a failure. This reduction lasts until the disease is cured. The creature dies if the disease reduces its hit point maximum to 0.

 Fire Breath.(Recharge 5–6). The death dog exhales fire in a 15-foot cone. Each creature in that area must make a DC 15 Dexterity saving throw, taking 29 (8d6) fire damage on a failed save, or half as much damage on a success