You can choose to hide your form.

You can choose to cast a disguised person over 1 minute. But you can only select a predetermined race and look that cannot be chanved

You armoured form provides additional protection against attacks,

You can don only armour with which you have proficiency. To don armour, you must incorporate it into your body over the course of 1 hour, during which you must remain in contact with the armour. To doff armour, you must spend 1 hour removing it. You can rest while donning or doffing armour in this way.

While you live, your armour can't be removed from your body against your will. In addition all armor gains the comfort rule.

You gain a +1 bonus to armor when wearing armor.

Many Warforged have integrated systems that have many specific functions. You may pick one from the above 

Force Pistol: Your arm can turn into a small side arm that fires arcane bolts. This weapon uses your dexterity modifier to hit and you are trained

in it increasing to expert at level 7 and master at level 14. It does 1d6 + dex mod + half your level<round down> force  damage per attack. You can use this once per turn.Activating and deactivating it requires a free hand and a action. It has a range of 50 feet

Emergency Systems: When you make your first death saving throw roll, a 15 and above is considered a critical success. 

Force Blade: Your arm can extend into a shimmering force blade. This weapon uses your dexterity modifier to hit and you are considered trained, incrasing to expert at level 7 and master at level 14 in it. It does 1d6 + STR or DEX + half your level force damage per attack.  Activating and deactivating it requires a free hand and a action. 

Brace Systems: Once a short rest, you can choose to lock your systems down as a reaction. You gain a +5 against saving throws against effects that move you or knock you prone and you reduce non-magical damage by half till the end of your next turn. However, your movement speed is reduced to 0 and you cannot take actions. You may end this at the end of your turn. 

Integrated Tool. Choose one tool you’re proficient with. This tool is integrated into your body, and thus giving advantage for any ability checks you make with it. You must have your hands free to use this integrated tool.

Nightvision: You gain 30ft of darkvision 

You’re machine form makes you incredibly resilient

• You have advantage on saving throws against being poisoned, and you have resistance to poison damage.
• 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.
• 1 and 2s count as critical fails on death saving throws, but 19 and 20s are considered critical successes. 
  

Varduin war constructs are powered by ancient eldritch energy, You can draw upon this force to channel your spells, at the cost of your resilience

Once a long rest, you can regain a spell slot equal to your level/3(roound up)(You can split so for a level 3 it becomes a first and 2nd level instead). When you do for the next six hours, you are considered vulnerable to all types of magical damage.  

When you take a long rest, you must spend at least six hours in an inactive, motionless state, rather than sleeping. In this state, you appear inert, but it doesn’t render you unconscious, and you can see and hear as normal.

Ancient Varduin magic, while weakening power and protecting your form against attacks.

When you have to make a saving throw against magical effects or spells, you gain a +2 against it. 

Built for war, these constructs have a uncanny talent for bloodshed

When you make a melee attack with disadvantage, you gain a +2 to hit