Barkskin

D&D 2024 spell: Barkskin. Source: Player's Handbook (2024). level 2, school Transmutation, casting time 1 bonus, range Touch, duration 1 hour

You touch a willing creature. Until the spell ends, the target's skin assumes a bark-like appearance, and the target has an Armor Class of 17 if its AC is lower than that.

Source: Player's Handbook (2024), p. 245 - Licenses and attribution