Barkskin
Level 2 Transmutation (Druid, Ranger)
Casting Time: 1 Bonus Action
Range: Touch
Components: V, S, M (a handful of oak bark)
Duration: 1 hour
Damage/Effect: Buff
You touch a willing creature. Until the spell ends, the target's skin assumes a bark-like appearance, and the target has an Armor Class of 17 if its AC is lower than that.