Barkskin 5e

School: Transmutation
Level: 2
Casting Time: 1 Action
Range: Touch
Components: V, S, M (A handful of oak bark)
Duration: Concentration, up to 1 hour

Spell Description

You touch a willing creature. Until the spellends, 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.