Dragonsoul

You have absorbed a dragon's essence. Determine your appearance. You gain the following benefits:

• Increase your Constitution score by 2 and your Strength score by 2, to a maximum of 20.

Soul Breath.  You now gain a dragon breath determined by what essence you absorbed. The damage type is determined by the color of the essence, and each creature in that area must make a Dexterity saving throw (DC 8 plus your Constitution modifier and Proficiency Bonus). On a failed save, a creature takes 1d10 Acid damage. On a successful save, a creature takes half as much damage. This damage increases by 1d10 when you reach character levels 5 (2d10), 11 (3d10), and 17 (4d10).

Draconic Metamorphosis. You gain one of these 4 features:

• Claws: Depending on the essence that you absorbed, your hands turn into claws that give your unarmed strikes an extra 1d4 of whatever element associated with that dragon.
• Wings: You gain a flight speed of 40 feet.
• Scales: You gain natural armor with an AC of 16.
• Brain: Your spell save DC is increased by 1. You can also cast a spell that would cost an action as a bonus action, once per long rest.

Grafted Skin. Whenever an attack goes to hit you while with any status condition, the critical threshold is reduced by 2 (Critical roll 18-20). NPC's will be naturally wary of you and upcharge for items (30-40%).