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

Golden Scales (Reaction). When Zelgu is hit by a melee attack, the attacker takes 1d4 piercing damage from Zelgu’s sharp golden scales.

Draconic Hierarchy Curse. Zelgu can fall under the influence of more powerful draconic beings. Upon encountering a draconic creature of higher power, Zelgu risks being corrupted, turning against his summoner.

Regenerative Summon. Zelgu is restored to full health after a long rest. If Zelgu is reduced to 0 hit points, he vanishes and returns to his summoner's ring, where he remains for a period of time before he can be summoned again. He cannot be healed during this time.

Multiattack. Zelgu makes two claw attacks.

Claw Attack. 
Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) slashing damage.

Breath Weapon. Once per summoning, Zelgu can use his breath weapon, a 15-foot cone of fire. Each creature in the area must make a DC 12 Dexterity saving throw, taking 7 (2d6) fire damage on a failed save, or half as much on a successful one.

Golden Scales. When Zelgu is hit by a melee attack, the attacker takes 1d4 piercing damage from Zelgu’s sharp golden scales.

 Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 5 (1d4) slashing damage.