Keen Hearing and Smell. The hound has advantage on Wisdom (Perception) checks that rely on hearing or smell.

Pack Tactics. The hound has advantage on an attack roll against a creature if at least one of the hound's allies is within 5 feet of the creature and the ally isn't incapacitated.

Bite. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 7 (3d8 + 3) piercing damage plus 7 (3d6) fire damage.

Fire Breath (Recharge 5–6). The hound exhales fire in a 30-foot cone. Each creature in that area must make a DC 14 Dexterity saving throw, taking 21 (8d6) fire damage on a failed save, or half as much damage on a successful one.

Pestilence Cloud (Recharge 5–6). The hound exhales swarm of biting insects in a 30-foot cone. Each creature in that area must make a DC 14 Constitution saving throw, taking 21 (3d6) piercing damage and is poisoned for 1 minute on a failed save, or half as much damage on a successful one. The player can repeat the save at the end of his/ her turn.

    When a pup of Zxi Zxi is killed, she will immediately move 15' and attack a random creature, including another fiend.

Zxi Zxi is unpredictable. Roll a D4 to see what she does.

1. Zxi Zxi moves her speed and makes a bite attack. This movement does not provoke attacks of opportunity.

2. Zxi Zxi recharges her fire breath weapon and uses it.

3. Zxi Zxi recharges her pestilence breath weapon and uses it.

4. Zxi Zxi howls. All creatures in a 30' radius make a DC 14 Charisma saving throw. Failure induces temporary madness.