3 hours/catalyst

As an action, you can create a vial of liquid with bark suspended in it. A creature can drink the contents as an action so its skin takes on a rough, bark-like appearance for the duration. The creatures’s Defense becomes 13 + half its Aptitude Bonus (min 1) + its Dexterity (max 4) as long as it isn’t wearing armor. The effect ends if the creature dons armor.