Your Strength score increases by 1, Constitution score increase by 1, and Charisma score Increase by 1.

A half-dragon generally follows the precepts and the beliefs of her dragon parent, adopting the alignment and beliefs typical of that dragon parent's kind. There are those who rebel against their dragon parents and their parents' alignments, sometimes going along with their non-dragon parent’s alignments instead. Though instances of this behavior are more common among chromatic half-dragon, the evil dragons are often keen to destroy rebellious offspring. As a result, half-dragon with unexpected alignments are rare among both metallic and chromatic varieties.

Barring unforeseen misfortune, a typical half-dragon's life expectancy is twice that of its non-draconic line, so that a half-dragon human might live more than a century and a half. Half-dragons take the age of their non-dragon parent and double it.

Half-dragons range from over 5 to under 7 feet tall and have muscular builds. Your size is Medium.

Your base walking speed is 30 feet.

Accustomed to twilit forests, cavernous depths, and the night sky, 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 draconic ancestry. Choose one type of dragon from the Draconic Ancestry table. Your breath weapon and damage resistance are determined by the dragon type, as shown in the table.

Draconic Ancestry

Dragon          Damage Type             Breath Weapon

Chromatic:

Black            Acid                        5 by 30 ft. line (Dex. save)

Blue             Lightning                 5 by 30 ft. line (Dex. save)

Brown           Acid                        5 by 30 ft. line (Dex. save)

Green           Poison                    15 ft. cone (Con. save)

Red              Fire                        15 ft. cone (Dex. save)

White            Cold                       15 ft. cone (Con. save)

 Grey             Acid                        15 ft. cone (Con. save)

 Purple         Psychic                   15 ft. cone (Int. save)

Metallic:

Brass            Fire                        5 by 30 ft. line (Dex. save)

Bronze          Lightning                5 by 30 ft. line (Dex. save)

Copper         Acid                        5 by 30 ft. line (Dex. save)

Cobalt           Force                      5 by 30 ft. line (Dex. save)

Chromium     Cold                       5 by 30 ft. line (Dex. save)

Mercury        Fire                        5 by 30 ft. line (Dex. save)

Mithril           Radiant                   5 by 30 ft. line (Dex. save)

Gold             Fire                        15 ft. cone (Dex. save)

Silver            Cold                       15 ft. cone (Con. save)

Adamantine  Thunder                  15 ft. cone (Dex. save)

Tungsten      Fire                        15 ft. cone (Dex. save)

Nickel           Acid                        15 ft. cone (Con. save)

Iron              Lightning                 15 ft. cone (Dex. save)

Orium           Acid                        15 ft. cone (Con. save)

Steel             Force                      15 ft. cone (Dex. save)

Gem:

Amethyst      Force                      5 by 30 ft. line (Con. save)

Crystal          Radiant                   5 by 30 ft. line (Con. save)

Emerald        Sonic                      15 ft. cone (Dex. save)

Sapphire       Lightning                 15 ft. cone (Con. save)

Topaz           Fire                        15 ft. cone (Con. save)

Obsidian       Fire                        15 ft. cone (Dex. save)

Ruby            Radiant                   15 ft. cone (Con. save)

Your scales harden. While you aren’t wearing armor, you can calculate your AC as 13 + your Dexterity modifier. You can use a shield and still gain this benefit.

When you use your breath weapon, each creature in the area of 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, At the start of each of your turn you can roll a d6 If the roll is a 6 you regain the use of your breath weapon again. The ability also recharges when the monster finishes a short or long rest.

You have resistance to the damage type associated with your draconic ancestry.

You can speak, read, and write Common, one other language from your non-draconic parent, and Draconic. Draconic is thought to be one of the oldest languages and is often used in the study of magic. The language sounds harsh to most other creatures and includes numerous hard consonants and sibilants.

You have proficiency in the Arcana skill.