Your Strength score increases by 2, Your Constitution score increases by 2, and your Charisma score decrease by 2.

Young Dwarven Half-Dragons mature quickly but age slowly, being considered an adult at the age of 15. On average, they live about 350 years.

Dwarven Half-Dragons stand between 4.5 and 5.5 feet tall and average about 200 pounds. Your size is Medium.

Your speed is not reduced by wearing heavy armor.

Accustomed to life underground, you have superior vision in dark and dim conditions. You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can’t discern color in darkness, only shades of gray.

You have advantage on saves against Piercing and resistance against Piercing damage.

You have proficiency with the battleaxe, handaxe, light hammer, and warhammer.

Breath Weapon

You can use your action to exhale destructive energy. Your draconic ancestry determines the size, shape, and damage type of the exhalation. When you use your breath weapon, each creature in the area of the exhalation must make a saving throw, the type of which is determined by your draconic ancestry. The DC for this saving throw equals 8 + your Constitution modifier + your proficiency bonus. A creature takes 2d6 damage on a failed save, and half as much damage on a successful one. The damage increases to 3d6 at 6th level, 4d6 at 11th level, and 5d6 at 16th level. After you use your breath weapon, you can’t use it again until you complete a short or long rest.

You gain proficiency with the artisan’s tools of your choice: smith’s tools, brewer’s supplies, or mason’s tools.

Whenever you make an Intelligence (History) check related to the origin of stonework, you are considered proficient in the History skill and add double your proficiency bonus to the check, instead of your normal proficiency bonus.

You can speak, read, and write Common, Dwarvish, and Draconic. Dwarvish is full of hard consonants and guttural sounds, and those characteristics spill over into whatever other language a dwarf might speak. While the Draconic language sounds harsh to most other creatures and includes numerous hard consonants and sibilants.