Barkskin

2nd-level transmutation

Casting Time: 1 action
Range: Touch
Components: V, S, M
Duration: Up to 1 hour

Material: A handful of oak bark.

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.

Druid · Ranger

On these spell lists

Druid spells
Ranger spells
2nd-level spells
Concentration spells
Transmutation spells

Other 2nd-level spells for the same classes

2nd level: 2Heat MetalTransmutation · 1 action
2nd level: 2Enhance AbilityTransmutation · 1 action
2nd level: 2Spike GrowthTransmutation · 1 action
2nd level: 2DarkvisionTransmutation · 1 action
2nd level: 2Hold PersonEnchantment · 1 action
2nd level: 2Lesser RestorationAbjuration · 1 action

Questions

What level is Barkskin?

Barkskin is a 2nd-level transmutation spell.

Which classes can cast Barkskin?

Druid and Ranger have Barkskin on their spell list.

Does Barkskin need concentration?

Yes. Its duration is up to 1 hour.