Dracthyr

Ancestry Traits

Size. Your size is Medium.
Speed. 30 ft.

Creature Type.
You are a Dragon.
Darkvision (1 point).
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 discern colors in that darkness only as shades of gray.
Breath Weapon (1 point).
When you take the Attack action on your turn, you can replace one of your attacks with an exhalation of magical energy in 15-foot cone. Each creature in that area must make a Dexterity saving throw (DC = 8 + your Constitution modifier + your proficiency bonus). On a failed save, the creature takes 1d10 acid, cold, fire, lightning, or poison damage. On a successful save, it takes half as much damage. This damage increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10). You can use your Breath Weapon a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.
Flight (1 point).
Because of your wings, you have a flying speed equal to your walking speed. You can't use this flying speed if you're wearing medium or heavy armor.
Shapechanger (1 point).
As an action, you may polymorph into one of your two forms: your visage form–a specific humanoid shape of your same sex– or your draconic dracthyr form. Your statistics are the same in each form, unless otherwise noted, but you cannot use your Breath Weapon or Flight trait in your visage form. Any equipment you aren't wearing or carrying isn't transformed, and you revert to your vulpine form if you die.

Paragon Options

Dragon Fear

As in the racial feat from Xanathar's Guide to Everything except the ability score increase is replaced with proficiency in the Intimidation skill.

Empowered Breath Weapon

Your breath weapon is greater than most, and can be used in special ways. You gain the following benefits:

Increased Wing Strength

Your fly speed increases by 10 feet, and you can now use this flying speed if you're wearing medium or heavy armor.

Neltharion's Warding

You gain a deeper connection to your draconic masters. Choose two of the following: acid, arcane, cold, fire, lightning, poison, or radiant. You gain resistance to the chosen damage types. If you chose poison, you have advantage on saving throws you make to avoid or end the poisoned condition on yourself.