Bastion's Project Armor

Using powerful magic of creation, you can form a magical copy of your armor around a willing creature of your choice. The chosen creature gains 50 temporary hit points. While they have any of the temporary hit points granted by this spell, their AC also equals the AC you gain from your armor. Other AC-improving effects or magic items you might have such as racial bonuses, fighting styles, magical rings or a shield are not accounted for. The armor that materializes around the target creature doesn't have any strength or proficiency requirement, and if it adds a Dexterity modifier, you use yours to calculate the given value.