Armored Casing. You are encased in thin metal or some other durable material. While you aren’t wearing armor, your base Armor Class is 13 + your Dexterity modifier. [this is considered your skin] [You are not considered wearing armor and may dawn armor.]

Ability Score Increase: Increase one ability score by 2, and increase a different one by 1, or increase three different scores by 1.

Languages: You can speak, read, and write Common and one other language that you and your DM agree is appropriate for the character.[gnomish]

Autognome (my type is Construct)
Size. You are Small.
Mechanical Nature. You have resistance to poison damage and immunity to disease, and you have advantage on saving throws against being paralyzed or poisoned. You don’t need to eat, drink, or breathe.
Sentry’s Rest. When you take a long rest, you spend at least 6 hours in an inactive, motionless state, instead of sleeping. In this state, you appear inert, but you aren’t unconscious.
True Life. If the Mending spell is cast on you, you can expend a Hit Die, roll it, and regain a number of hit points equal to the roll plus your Constitution modifier (minimum of 1 hit point). In addition, your creator designed you to benefit from common spells that preserve life, but that normally don’t affect constructs: Cure Wounds, Healing Word, and Spare the Dying.

Specialized Design: You gain two tool proficiencies of your choice.

Built for Success: You can add a d4 to one attack roll, ability check, or saving throw you make, and you can do so after seeing the d20 but before the effects of the roll are resolved. You can use this trait a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.

Death Touch. You can focus your deadly touch against your foes. As an action, make one unarmed strike. On a hit, the target takes an additional 1d10 necrotic damage. This damage increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10).

Inescapable Death. When you hit a target with an attack roll and deal necrotic damage, you ignore the target's resistance to that damage.

Withering Contact. When you start your turn grappling a creature or grappled by it, the creature takes 1d10 necrotic damage.

Tasha’s Cauldron of Everything Feat