Barkskin
2nd-level transmutation
Casting Time 1 action
Range Touch
Components V, S, M (A handful of oak bark)
Duration Concentration, up to 1 hour
Classes Druid, Ranger
You touch a willing creature. Until the spell ends, the target's skin has a rough, bark-like appearance, and the target's AC can't be less than 16, regardless of what kind of armor it is wearing.