These robes have been magically enchanted and created with fine silk and leather. These robes provide the wearer with a +3 bonus to AC and can store a maximum of 50 charges, if full it sheds dim blue light for five feet. Every time the wearer takes bludgeoning damage, the armor gains a number of charges equal to the damage taken.
As an action the wearer can expend 50 charges to cast Thunderwave, DC 15 requiring no verbal or somatic elements.
As a reaction to being hit with a melee weapon attack, (but before damage has been taken) the wearer can expend the charges to cast Thunderwave, DC 15 requiring no verbal or somatic elements. If the attacker fails their saving throw the wearer takes no damage.
Each charge expended equals 1 point of force damage.

Notes: Bonus: Armor Class