auto armor shifter

a small metal sphere, approximately 2 inches across. Despite a strong magical aura, it has no obvious abilities. When you attune to a auto armor shifter, the sphere becomes embedded in your chest, you can use the intergrated protection feature to switsh your armor type ,as a bonus action, instead off when you finish a long rest,

Notes: warforged, Control, Buff, Combat, Shapechanging, Warding