As an action, you can create a vial of light blue liquid that continuously produces a coating of ice on the outside of the vial. A creature can drink the contents as an action. While it isn’t wearing armor a protective coating of ice surrounds its body until the effect ends. The creature’s Defense becomes 13 + half its proficiency bonus + its Dexterity (max 4). The effect ends if the target dons armor or if it dismisses the effect (no action required).