Bramble Armor

You touch a willing creature who isn't wearing armor, brambles and thorns encircle their body until the spell ends. The target's base AC becomes 13 + its Dexterity modifier. The spell ends if the target dons armor or if you dismiss the spell as an action.

While you are wearing bramble armor, you can use a bonus action to make one melee weapon attack with the thorns against a target within 5 feet of you. If the attack hits, the spikes deal 1d4 piercing damage. You use your Strength modifier for the attack and damage rolls.

Additionally, when you use the Attack action to grapple a creature, the target takes 3 piercing damage if your grapple check succeeds.