Armor of Thorns

This leather armor is adorned with metal thorns that can harm enemies that come within range. As a reaction, when an enemy makes a melee weapon attack against you, you can ram the spikes into their body. Make an unarmed strike against the enemy, on a successful hit the target takes 2d4 piercing damage. You have a +1 bonus to AC while wearing this armor. 

Made from tough but flexible leather, studded leather is reinforced with close-set rivets or spikes.

Notes: Bonus: Armor Class, Combat, Warding