The Abyssal Aegis is a set of demonic plate armor infused with the power of the abyss. When attuned to this armor, you gain the following benefits:

this armor imposes disadvantage on dexterity(stealth) 

this armor was made with abyssal ore making any attack that is critical against the wearer a normal hit

 The Abyssal Aegis offers resistance to fire damage, rendering granting the wearer power from searing flames of the abyss.

Dark Resilience. The armor provides a +2 bonus to your AC (Armor Class)

Infernal Endurance. While wearing the Abyssal Aegis, your Strength and Constitution scores are each increased by +2, to a maximum of 22.

Abyssal Presence. You radiate an aura of demonic energy that strikes fear into your enemies. You have advantage on Charisma (Intimidation) checks.

Hellforged Resurgence. Once per long rest, when you fall to 0 hit points, the armor's infernal magic instantly revives you with 20 hit points, and you gain temporary hit points equal to your Constitution modifier (minimum 1). This revival is accompanied by a burst of flames that damages all creatures within a 10-foot radius for 3d6 fire damage. The fire damage does not affect you.

Plate consists of shaped, interlocking metal plates to cover the entire body. A suit of plate includes gauntlets, heavy leather boots, a visored helmet, and thick layers of padding underneath the armor. Buckles and straps distribute the weight over the body.

Notes: Immunity: Critical Hits, Advantage: Intimidation, Resistance: Fire, Bonus: Choose an Ability Score to increase by 2, Bonus: Armor Class, Bonus: Choose an Ability Score to increase by 2, (any medium sized creature) the plate seems to give off a slight cinder accompanied by a puff of smoke, Combat, Warding, Str. 15 Required, Stealth Disadvantage