Draconic sentinels are not born, they are made. as such time has very little effect on them.

Dragonic sentinels are taller and heavier than humans, standing well over 6 feet tall and averaging almost 250 pounds. Your size is Medium.

Your base walking speed is 30 feet.

You have acces to a variety of draconic ancestry data, in your databanks. Choose one type of dragon from the Draconic Ancestry table once per dawn, during a longrest. Your breath weapon and damage resistance are determined by the dragon type, as shown in the table.

Draconic Ancestry

You can use your action to exhale destructive energy. Your draconic ancestry determines the size, shape, and damage type of the exhalation. When you use your breath weapon, each creature in the area of the exhalation must make a saving throw, the type of which is determined by your draconic ancestry. The DC for this saving throw equals 8 + your Constitution modifier + your proficiency bonus. A creature takes 2d6 damage on a failed save, and half as much damage on a successful one.

During your breathweapon, you need to make a DC 13 Wisdom saving throw. On a succesful throw the breathweapon functions as normally, on a failed save the breath weapon malfunctions and becomes a 15ft radius explosion centered on the draconic sentinel

The damage increases to 3d6 at 6th level, 4d6 at 11th level, and 5d6 at 16th level. After you use your breath weapon, you can’t use it again until you complete a short or long rest.

You have resistance to the damage type associated with your draconic ancestry.

You can speak, read, and write Common and Draconic. Draconic is thought to be one of the oldest languages and is often used in the study of magic. The language sounds harsh to most other creatures and includes numerous hard consonants and sibilants.

You were created to have remarkable fortitude, represented by the following benefits:

• You have advantage on saving throws against being poisoned
• You don’t need to eat, drink, or breathe.
• You are immune to disease.
• You don’t need to sleep, and magic can’t put you to sleep.

Your body has built-in defensive layers, which can be enhanced with armor:

• You gain a +1 bonus to Armor Class.
• You can don only armor with which you have proficiency. To don armor other than a shield, you must incorporate it into your body over the course of 1 hour, during which you remain in contact with the armor. To doff armor, you must spend 1 hour removing it. You can rest while donning or doffing armor in this way.
• While you live, the armor incorporated into your body can’t be removed against your will.

Your metalic frame is so heavy, it gives you disadvantage to stealth checks and acrobatic checks.