Defensive Quills

Sharp quills grow from your skin. You can end the spell early by using an action to dismiss it. You gain a +1 bonus to AC for the duration. If a creature hits you with an attack made by a light weapon, a natural attack, or an unarmed strike, it takes 2d8 piercing damage from your quills. A creature that grapples you takes damage from the quills at the beginning of each of its turns in which it is grappling you. If a creature swallows you, it takes damage from the quills each round at the start of your turn.