Bahamut Statuette

It is a small 1 inch figurine baring a platinum dragon curled around a clump of metal. It's tail curled enough for a chain to pass through allowing a person to wear it. 

In the presence of evil it grows to 3 Inches and imbues the wearer with power based on the lump of metal it stands atop.

In ascending order from weakest, Brass, Copper, Bronze, Silver, Gold, Adamantine, Platinum.

Brass: +1 Persuasion & + 1/2 Proficiency in Persuasion if not proficient.

Copper: Adv on intelligence checks and  persuasion relating to dragons. The wearer gains to ability to SPEAK Draconic. (Not read or write)

Bronze: +2d8 Fire damage to one melee or spell attack against an evil aligned enemy. You can use this feature a number of times equal to your charisma modifier per long rest.

Silver: Wearer is under the effects of Protection from Evil and Good when in the face of evil.

Gold: The wearer can Speak, Read, and Write Draconic. Additionally the wearer gains a breath weapon (Recharge of 6) 

        Breath Weapon: 6d6 Fire damage in a 60 ft cone. Anyone caught in the cone must make a Dexterity Saving Throw Equal to your spell save dc. (if you do not have one it's 8+ proficiency+ your intelligence mod)

Adamantine: The wearer gains +2 to their AC

Platinum: The wearer gains the ability to cast Revivify without using spell slots of components once per 2d20 days (roll after using it)

Upgrading the statue's metal clump:

In order to upgrade the statue one must gather 50 lbs of the material in a pile placing the statue on top. Then they must offer a prayer of sorts to Bahamut along with a promise to do more good in the world; After which the statue consumes the metal and the clump changes based on the metal it sat atop. The clump must be upgraded in order of power. Ex Brass---> Copper is allowed but Copper----->Gold is not allowed.

Nobody knows what it will do when in the presence of the Dragon Queen herself.

Notes: Set: Constitution Score, You must have a Good alignment to attune with this item. Attuning to this necklace requires wearing it on your person while preforming a good deed. , Buff, Jewelry