Nanomachines

Important: This feat is intended for warforged only!

You have millions of nanomachines availbable to you, assisting you in multiple ways.

Adaptive Resilience
After being attacked three times by the same opponent, your nanomachines start to develop a resistance against the opponent's attacks. Your AC increases by 1 against that specific enemy. This effect can stack up to 5 times. This ability accounts for every enemy that attacks you, no limtations such as attacks/enemies per round, your DM may change his though :).

Adaptive Offensive
After hitting a creature with a weapon 3 times in a row, you gain advantage on attacks against that creature with that weapon.

Weakspot Analysis
If you crit a creature with a weapon, you can now crit on a 19 or higher, with that same weapon and creature.
if you crit again the roll needed to crit goes down by 1 maxing out at 17.

 optional (for groups of creatures of the same races and weapons double the number of times you get hit before obtaining the benefits )

Enhancement: Adaptive Fighting
By spending 10 HP, you can increase one of your basic stats(DEX, STR, CON...) by 1. You can spend as many HP per round as you want. Your max HP are reduced by the amount of HP spent this way until your next long rest.

Enhancement: Sensor Overclock
The naomachines assist in your sensory function, allowing you to attack more accurately. Add +6 to every hit dice.