Crocskin

Disclaimer: This spell was derived from the Barkskin spell. It was modified specifically for the homebrewed Osha Domain Cleric subclass. Please speak with your GM before adding this to your spell list. 

You touch a willing creature. Until the spell ends, the target's skin has a rough, scale-like appearance, and the target's AC can't be less than 16, regardless of what kind of armor it is wearing.