Barkskin
2nd-level, Transmutation
- Casting time: 1 action
- Range: Touch
- Components: V, S, a handful of oak bark
- Duration: Concentration, up to 1 hour
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.
Source: SRD / Basic Rules