Armor of Thorn and Claw

Razor-sharp thorns and claws erupt from your skin or scales. Whenever a creature touches you or hits you with a melee unarmed attack, it takes 1 piercing damage. Additionally, if you become Grabbed, Restrained, or otherwise held Immobilized in a creature's grasp, such as by being engulfed or swallowed, the creature takes @Damage[(ceil(@item.rank / 2))d4[persistent,bleed]] damage.

Heightened (+2) The piercing damage increases by 2, and the persistent bleed damage increases by 1d4.