Firewall

Firewalls are seasoned warriors that have augmented their physical abilities with mechanical components to improve their battlefield efficiency. These warriors take some basic training in the halls of the artificers to be able to craft and modify combat prosthesis. Tech corporations exclusively support these warriors and employ them as guards or use them as private armies to protect or secure assets. This employment is the source of their name. 

Tech Warrior

At 3rd level when you take this Martial Archetype you gain the following items from Ebberon - Rising from the Last War. These items do not count towards your maximum magical item or attunement limits. All requirements for these items are considered to be fulfilled by the class. 

Prosthetic Limb: Wondrous item, common (requires attunement by a creature missing some or all of a limb) This artificial limb replaces a hand, arm, foot, leg, or similar appendage that was lost or removed. While the prosthetic is attached and attuned to you, it functions identically to the body part it is replacing. You can detach or reattach it as an action, and it can't be removed by anyone else. If you have multiple prosthetic limbs, they count as a single magic item with regard to the number of magic items you can attune to.

Arm Blade Weapon: (any one-handed melee weapon), common (requires attunement by a warforged) An armblade is a magic weapon that attaches to your arm, becoming inseparable from you as long as you're attuned to it. To attune to this item, you must hold it against your forearm for the entire attunement period. As a bonus action, you can retract the armblade into your forearm or extend it from there. While it is extended, you can use the weapon as if you were holding it, and you can't use that hand for other purposes.

You also gain proficiency with smiths tools and gain the ability to cast the cantrip Mending and the spell Heat Metal as a 2nd level spell on any piece of metal not currently equipped by a creature.  

Augmented Senses

By level 7 you have created a device that enhances your natural senses. You gain darkvision up to 60 ft if you do not have it already and have advantage in perception checks to find enemies and traps. You also cannot be surprised.

Scheduled Update

At level 10 you gain a combat update. This update makes you immune to fear and charmed effects and you can now add your proficiency bonus to your initiative.

New Hardware

At level 15 your benefactors have decided to provide you improved combat equipment. You gain a +1 to all melee attacks and damage and a +1 bonus to your AC. You can also don and doff your armor as a bonus action.

Repair Protocols

By the 18th level you have gained the ability to activate your repair protocols during combat. Once per day you can activate your repair protocols to regain 1d8 + your Fighter level HP at the beginning of every turn for 3 turns. During this time your movement is halved (rounded down) and you roll all Dex saving throws with disadvantage.