You have a gem dragon ancestor, granting you a special magical affinity. Choose one kind of dragon from the Gem Ancestry table. This determines the damage type for your other traits, as shown in the table.

Gem Ancestry

When you take the Attack action on your turn, you can replace one of your attacks with an exhalation of magical energy in either a 15-foot Cone or a 30-foot Line that is 5 feet wide (choose the shape each time). 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 damage of the type determined by your Gem Ancestry trait. 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).

You can use this Breath Weapon a number of times equal to your Proficiency Bonus, and you regain all expended uses when you finish a Long Rest.

You have Resistance to the damage type determined by your Gem Ancestry trait.

You can send telepathic messages to any creature you can see within 30 feet of you. You don’t need to share a language with the creature for it to understand these messages, but it must be able to understand at least one language to comprehend them.

When you reach character level 5, you can channel draconic magic to give yourself temporary flight. As a Bonus Action, you sprout spectral wings on your back that last for 10 minutes or until you retract the wings (no action required) or have the Incapacitated condition. During that time, you have a Fly Speed equal to your Speed. Your wings appear to be made of the same energy as your Breath Weapon. Once you use this trait, you can’t use it again until you finish a Long Rest.