Barkskin
2nd-level transmutation (concentration) · 2014 rules, SRD 5.1
- 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.
Also in the 2024 rules (SRD 5.2).