Cuirass of the Steadfast Shaman

AC. 14 + Dexterity modifier (max 2)   Shattering Retaliation. When you are critically hit by a melee attack while wearing this armor, it shatters and is completely destroyed. All creatures of your choice within 5ft. of you have to make a Dexterity saving throw (DC 15). On a failed save they take 6d6 Force damage. On a successful save they take half damage.   Enduring Armor. When the armor is completely destroyed while you are wearing it, the armor casts the spell Mage Armor on you right before it is destroyed. Your AC becomes 13 + your Dexterity modifier for the next 8 hours. The spell ends early if you don armor or if you dismiss the spell as an action.