Comments from the Finger: I'm working on making it possible to have a character of any class that has a dragon theme, mostly for giggles.
Circle of the Scale
Druids who join the Circle of the Scale hold dragons in higher esteem than all other works of creation. These druids believe, as many dragons do, that wyrms are perfect creatures, the pinnacle of all life brought into existence by the gods. Likewise, these druids aspire to perfect wyrmhood, and gradually become like dragonkind.
Starting when you choose this circle at 2nd level, your beast shapes resemble dragons. You gain the ability to use Wild Shape on your turn as a bonus action, rather than as an action.
While transformed, your skin is covered in a layer of scales, and your AC is increased by 2.
Also, while transformed, you can use your bonus action to expend one spell slot and breathe fire from your mouth. Each creature in a 30 foot cone must make a Dexterity saving throw. A creature takes 1d8 fire damage per level of the spell on a failed save, or half as much on a successful one.
Starting at 6th level, your attacks in beast form count as magical for the purpose of overcoming resistance and immunity to nonmagical attacks and damage.
Draconic Wild Shape
At 10th level, you can spend two uses of Wild Shape at the same time to transform into any dragon of challenge rating 6 or lower. You can't use a dragon's Innate Spellcasting feature, if it has one.
By 14th level, you have achieved the majesty of a dragon. Even when not transformed, you have majestic dragon wings, and your skin is covered in a layer of scales. While not carrying a shield, you have a +2 bonus to AC, and while unarmored or wearing only light armor, you have a flight speed equal to your base movement speed.