Homebrew Dragon Species Details

It has been told countless times child, the tales of their power, their intellect and of the magic that was born within them. Yet not all these tales are true, some exaggerated to make for more thrilling stories to excite the young hearts of children, others fairy tales told by the great storytellers of our time and times past. Yet no matter the story, no matter the exaggeration, no matter the fairy tale, one thing always remains told true, they are Dragons by name and dangerous by nature. Creatures taller than any human upon their birth, and growing to tower over the tallest castle at adulthood, covered in scales tougher than any armor, with claws longer and sharper than blades, fangs longer than your head, wings stretching as far as the nights sky and eyes so keen and sharp they'll spot even the smallest of creatures from miles away. It would do us no good to forget the storms of fire, ice and lightning raining from their mouths, oh they are fierce beasts and yet they are the things of wonder.
Many dream of meeting one, for most however it is their worst nightmare, for they are reminders of the calamity that fell this world into destruction and chaos. They are the ones that gifted us with their wisdom, granted us the ability to wield the powers of magic, they were once our protectors, our guides towards knowledge. For all they gave to us they felt we owed them more, obedience, loyalty and most of all we were their cattle. Of course those of the past did not agree with this, they rebelled, they fought and destruction was all that greeted them. For they were humans and the others they fought against, well, son, they were Dragons.
And Dragons cannot be killed.
A Story from a caring father, Odarion Clove.
Dragon Traits
The traits shared by all sealed dragons.Ability Score Increase
Your Strength and Constitution are both increased by 2
Age
Dragons reach maturity at around the age of 100, they however are not bound by a limited lifespan and can live for as long as they are not slain. The oldest recorded dragon in history was said to be over 4000 years old.
Alignment
Dragons tend to the extremes of alignment based on their subtype. You are not typical of your race and may choose any alignment.
Sealed Form
For reasons known only to you and those that have placed you within your current form, you are sealed within a human form. You are unable to return into your true dragon form. While within this form you are the size of a normal human and have the same movement speed as one.
Movement Speed
You have a base movement speed of 30 feet.
Dragon Ancestry
Choose a dragon type. Your scale color and draconic resistance are determined by the species you choose.
Dragon Sight
You have Darkvision to a range of 60ft
Draconic Strength
Your strength stat is not as limited as it is to humans, your strength can be increased to a maximum equal to your dragon ancestry. (An Example being Black Dragon having a maximum of 27 strength)
Your constitution stat is also not as limited as it is to humans, much like your strength it can be increased to a maximum equal to your dragon ancestry. (An example being Black Dragons having a maximum of 25 Constitution)
However you cannot increase them over 20 until you reach lvl 10, and cannot increase them over 22 until lvl 15.
Breath Weapon
You possess a breath weapon that corresponds to your draconic ancestor. When using your breath weapon, creatures in your breath must make a Dexterity or Constitution (depending on ancestry) saving throw against a DC that is equal to 8 + your Constitution modifier + your proficiency bonus. If they succeed, they take half damage, if they fail, they take full damage. Your breath weapon does 2d6 damage of the same type as your resistance damage type. This increase to 3d6 at level 6, 4d6 at level 11, 5d6 at level 16. The damage type, saving throw, area, and range correspond to draconic ancestor type (see Dragonic Ancestry table). You cannot use this again until you complete a short or long rest.