Possibly a Idiot.
Kobold Dragonshield (VGTM)
Kobolds, as you may have guessed from my avatar, are my favorite monster type in D&D. There is just something appealing about the least of dragons, who are weaker than humans, banding together to stop the fearsome adventurers who would raid their humble homes.
The Kobold Dragonshield serves as the vanguard for their people. The kobold who boldly goes to the frontline so that all other kobolds can enjoy the benefit of their Pack Tactics. As a reward for their services, the Dragonshield is granted (relatively) great powers by a patron dragon. Increased strength and resilience, the ability to resist elemental damage, and the power to shrug off fear and paralysis. And to top it all off, the Dragon type (making the Kobold immune to spells that only target humanoids. Most commonly charm type spells).
Now you are probably thinking, that sounds like a lot, and while it is, a keen DM will notice that it’s almost all defensive power there. Which goes back into the Dragonshield’s role of being a meatshield. While they do have a multiattack with a spear, it is less accurate than a normal kobold attacking with a sling or dagger. Their best option in combat just might be dodging in front of the enemy, allowing the ranged kobolds behind them to shoot with advantage. Given the Dragonshield’s short nature, they won’t even grant cover to some of your bigger PCs. And while there aren’t a lot of kobolds who will be able to rush to the side of a Dragonshield in combat, they can be flanked with traps (preferably of the compex kind found in Xanathar’s Guide to Everything). Guard Drakes* also work well with Dragonshields, particularly as mounts.
*also in this book.
In the changeover, the Dragonshield was changed into a Dragon. Their multiattack was changed to work with ranged spear attacks as well as melee, and their resistance chart now includes the influence of Metallic Dragons.