Wondrous Item, artifact
An ancient dragon tablet that you found long ago. You spend most of your time trying to decipher it to harness it's power but you have difficulty trying read it. Though you can read draconic you have come to the conculsion through your studies that this some form of long forgotten or perhaps divine draconic dialect.
Aspect of the Black Dragon.
As a bonus Action. Lasts for 1 minute.
You can a +1 AC and resistance to Acid Damage.