Shatterspike

Uncommon

Weapon (longsword), uncommon (requires attunement) You have a +1 bonus to attack and damage rolls you make with this magic weapon. If it hits an object, the hit is automatically a critical hit, and it can deal bludgeoning or slashing damage to the object (your choice). Further, damage from nonmagical sources can’t harm the weapon.

Mytril Full Plate armor

Uncommon

Mithral Armor (Plate) Mithral is a light, flexible metal. A mithral chain shirt or breastplate can be worn under normal clothes. If the armor normally imposes disadvantage on Dexterity (Stealth) checks or has a Strength requirement, the mithral version of the armor doesn't. [23:18] DDHC-MORD-01 Riddle of the Raven Queen