Prerequisite: Requires the race of Warforged
You have -2 to AC.
When a creature within 5 feet of you hits you with a melee attack, that creature must make a Dexterity saving throw with a DC of 8 + your proficiency bonus. On a failed save that creature takes an amount of piercing damage equal to 1d4 + your proficiency bonus.
This ability does not affect creatures using Reach weapons.