Acorn of Ironbark

When you drink this potion, your skin transforms into a tough, oak-like bark for 30 minutes. For the duration, your AC can't be less than 16, regardless of what kind of armor you are wearing. Visually, your skin becomes rough and brownish, akin to the bark of an ancient oak. This potion's container appears to be a simple acorn, and the potion within has a texture reminiscent of tree sap.

Notes: Set: Minimum Base Armor